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, Ortigosa, Javier, Zheng, Nan, Menendez, Monica, Geroliminis, Nikolas, 2015 >>
Autor(en): Ortigosa, Javier, Zheng, Nan, Menendez, Monica, Geroliminis, Nikolas
Titel: Analysis of the 3D-vMFDs of the Urban Networks of Zurich and San Francisco
Kurzbeschreibung: In this paper we are studying the trade-off of urban road space dedicated to cars and buses (or trams) in two cities: Zurich and San Francisco. We employ the three-dimensional vehicle Macroscopic Fundamental Diagrams (3D-vMFD) which consist of creating the MFDs for networks with different levels of public transport operations. Based on the 3D-vMFD, we analyze and evaluate network performances when the percentage of dedicated bus lanes varies in a city. Simulation results show that when there are more dedicated bus lanes, the performance of cars worsens and the transit performance improves.2
Buchtitel: 2015 IEEE 18th International Conference on Intelligent Transportation Systems (ITSC)
Seiten: 113 - 118
ISBN: 978-1-4673-6595-6, 978-1-4673-6596-3
Publikationsdatum / Empfangsdatum: 2015-01-01
Publikations-Status: Piscataway, N.J.
Publikations-Status: Published
Eventname: 18th International Conference on Intelligent Transportation Systems (ITSC 2015)
Eventdatum: September 15-18, 2015
Ort: Gran Canaria, Spain
Sprache: English
DBID Quelle: FORM-1446036806, SCOPUS-84950293518
DOI: 10.1109/ITSC.2015.27
, Ortigosa, Javier, Zheng, Nan, Menendez, Monica, Geroliminis, Nikolas, 2015 >>
Autor(en): Ortigosa, Javier, Zheng, Nan, Menendez, Monica, Geroliminis, Nikolas
Titel: Analysis of space allocation strategies between buses and cars with the multimodal MFD
Kurzbeschreibung: In this paper we are studying the trade-off of urban space devoted to cars and buses (or trams) in two cities: Zurich and San Francisco. We employ 3D vehicle Macroscopic Fundamental Diagrams (3D- vMFD) which consist of creating the MFDs for vehicles with several public transport frequencies. We analyze the percentage of dedicated bus lanes in a city. When there are more dedicated bus lanes, the car performance worsens and the transit performance improves. The data is generated with two microsimulation models, VISSIM for Zurich, and Aimsum for San Francisco. The ultimate purpose of this paper is to find the optimal percentage of dedicated bus lanes in a city which optimizes the rate of passengers finishing their trips (either by car or by bus). We present this optimization methodology which can help urban planners to find the most efficient share of space for transportation modes in cities.2
Publikationsdatum / Empfangsdatum: 2015-01-01
Publikations-Status: Ascona
Publikations-Status: Accepted
Einordnungen: Traffic operations, MFD, 3D-vMFD, Dedicated lane, Mixed lane, Public Transport
Eventname: 15th Swiss Transport Research Conference (STRC 2015)
Eventdatum: April 15-17, 2015
Ort: Ascona, Switzerland
Sprache: English
Schlüsselwort: Traffic operations, MFD, 3D-vMFD, Dedicated lane, Mixed lane, Public Transport
DBID Quelle: FORM-1432375562
, Ortigosa, Javier, Menendez, Monica, Gayah, Vikash V., 2015 >>
Autor(en): Ortigosa, Javier, Menendez, Monica, Gayah, Vikash V.
Titel: Analysis of the Network Exit Functions for Different Urban Grid Network Configurations
Kurzbeschreibung: Macroscopic network-wide traffic models have been broadly used to study aggregate traffic behavior on urban networks and to design traffic control strategies. However, less attention has been paid to their application in studying street network design. In this paper, we analyze traffic performance on an abstract grid network with different street configurations using the Network Exit Function (NEF)an aggregate relationship between trip-completion rate and the number of vehicles circulating in a network. This is a topic of recent interest in many cities, especially in the US where city planners are considering street network conversions. In particular, we consider three different configurations: two-way streets (TW), two-way streets with prohibited left turns (TWL), and one-way streets (OW). This work builds on previous studies on this topic by incorporating more realistic traffic dynamics using a micro-simulation software (VISSIM) with Dynamic Traffic Assignment (DTA) enabled to better emulate real drivers behavior. Overall, this work finds that NEFs of TW networks are generally smaller than those of TWL and OW networks due to the reduced capacity offered at intersections. Comparison of TWL and OW networks is more nuanced as traffic performance on these networks depends on route choice. If vehicles are always routed through the path with the shortest travel time, TWL networks offer NEFs with higher trip completion rates. However, if vehicles spread themselves across multiple alternatives, OW networks turn out to provide better results. This occurs because TWL networks offer a better trade-off between distance travelled and capacity at intersections, while OW networks offer more shortest-path routing choices between origin-destination pairs.2
Buchtitel: TRB 94th Annual Meeting Compendium of Papers
Seiten: 15-2886
Publikationsdatum / Empfangsdatum: 2015-01-01
Publikations-Status: Published
Eventname: 94th Annual Meeting of the Transportation Research Board (TRB 2015)
Eventdatum: January 11-15, 2015
Ort: Washington, DC, USA
Sprache: English
DBID Quelle: FORM-1426245974
, Ortigosa, Javier, Gayah, Vikash V., Menendez, Monica, 2015 >>
Autor(en): Ortigosa, Javier, Gayah, Vikash V., Menendez, Monica
Titel: Analysis of Network Exit Functions for Various Urban Grid Network Configurations
Kurzbeschreibung: Macroscopic networkwide traffic models have been used to study aggregate traffic behavior on urban networks and to design traffic control strategies. However, less attention has been given to their application in the study of street network design. This paper uses the network exit function (NEF) to analyze traffic performance on an abstract grid network of various street configurations. The NEF is an aggregate relationship between trip completion rate and the number of vehicles circulating in a network. Street configuration is a topic of interest in many cities, especially in the United States, where city planners are considering street network conversions. Three configurations are addressed here: two-way streets, two-way streets with prohibited left turns (TWL), and one-way streets. This work builds on previous studies by incorporating more realistic traffic dynamics with microsimulation software (VISSIM) with dynamic traffic assignment enabled to emulate better the behavior of real drivers. This work finds that NEFs of two-way networks generally are smaller than those of TWL and one-way networks because of reduced capacity at intersections. Comparison of TWL and one-way networks is more nuanced, as traffic performance on these networks depends on route choice. If vehicles are always routed through the path with the shortest travel time, TWL networks offer NEFs with higher trip completion rates; however, if vehicles spread themselves across multiple alternatives, one-way networks provide better results. TWL networks offer a better trade-off between distance traveled and capacity at intersections, and one-way networks offer more shortest-path routing choices between origin–destination pairs.2
Publiziert in: Transportation Research Record
Band: 2491
Seiten: 12 - 21
ISSN: 0361-1981, 2169-4052
Publikationsdatum / Empfangsdatum: 2015-01-01
Publikations-Status: Washington, DC
Publikations-Status: Published
Sprache: English
DBID Quelle: FORM-1448972342, WOS-000365245600003
DOI: 10.3141/2491-02
Nebis System Nummer: 000024408
, Ortigosa, Javier, Menendez, Monica, Tapia, Hector, 2014 >>
Autor(en): Ortigosa, Javier, Menendez, Monica, Tapia, Hector
Titel: Study on the number and location of measurement points for an MFD perimeter control scheme
Untertitel: A case study of Zurich
Kurzbeschreibung: The goal of this paper is to evaluate the data requirements for a possible implementation of a macroscopic fundamental diagram (MFD) control scheme in an urban area. Particularly, we have studied the accuracy of MFDs created using only a percentage of the links (i.e., streets). This is especially useful because monitoring resources are often scarce, and most cities do not have access to the large amount of information that is typically associated with the construction of an MFD. We evaluated several strategies that cities typically use to place fixed monitoring devices (e.g., loop detectors), and compared them with a quasi-optimal way to choose the links. The results show that independently of the strategy used for link selection, a minimum of 25 % of network coverage, according to our accuracy methodology, ensures an average error in density ratios below 15 percentage points (ppts). Based on the particular case of the city of Zurich, we also analyzed the feasibility of implementing an MFD control scheme with the links that are currently monitored. Results are very encouraging, showing an average error below 9 ppts. Although all results were obtained with a VISSIM microsimulation model of the inner city of Zurich, we believe the knowledge and methodology presented here can be transferred to other urban areas. In fact, we are hopeful that this research can contribute to making the implementation of an MFD control scheme feasible for many cities.2
Publiziert in: EURO Journal on Transportation and Logistics
Band: 3
Ausgabe: 3-4
Seiten: 245 - 266
ISSN: 2192-4376, 2192-4384
Publikationsdatum / Empfangsdatum: 2014-10-01
Publikations-Status: Berlin ; Heidelberg
Publikations-Status: Published
Einordnungen: Macroscopic fundamental diagram, Network fundamental diagram, Urban traffic, Perimeter control implementation, Zürich, Traffic measurements, Traffic monitoring
Sprache: English
Schlüsselwort: Macroscopic fundamental diagram, Network fundamental diagram, Urban traffic, Perimeter control implementation, Zürich, Traffic measurements, Traffic monitoring
DBID Quelle: FORM-1378475229, FORM-1354367191
DOI: 10.1007/s13676-013-0034-0
, Ortigosa, Javier, Thomann, Sylvie, Ge, Qiao, Menendez, Monica, 2014 >>
Autor(en): Ortigosa, Javier, Thomann, Sylvie, Ge, Qiao, Menendez, Monica
Titel: Dynamic properties of grid urban networks
Kurzbeschreibung: Urban grid networks might present different ways to structure streets and consequently, traffic, might be accommodated differently. In the present paper, we analyze three grid configurations: two-way streets, two-way streets with prohibited left turns, and one-way streets. We simulate traffic in them with the micro simulation software VISSIM and we distribute trips employing the dynamic traffic assignment integrated in it. In this way, we are able to analyze the dynamic behavior of traffic. Typically, in static simulations, oversaturated links or intersections have really large delays but these delays, contrary to what happens in reality, do not affect other links. We are interested in understanding which configuration is more resilient to the propagation of congestion, and this cannot be seen when employing static models. In addition, the static simulations provide macroscopic indicators such as the total travel time or the total travel distance. However, the dynamic perspective provides a new set of indicators to evaluate our networks, and we are especially interested in using the Macroscopic Fundamental Diagram (MFD) as one of them. The MFD is a traffic monitoring scheme that determines the upper bound of network traffic states relating trip production rate and density of trips. Our goal is to generate MFDs in the different networks and to employ it as indicators of the network performance. Depending on the MFD shape, networks might have different properties when dealing with traffic. In this paper, we discuss this issue by comparing the three different urban grid configurations.2
Publikationsdatum / Empfangsdatum: 2014-05-01
Publikations-Status: Monte Veritá, Ascona, Switzerland
Publikations-Status: Published
Einordnungen: Traffic operations, MFD, Network modeling, DTA, Grid, Urban planning
Eventname: 14th Swiss Transport Research Conference (STRC 2014)
Eventdatum: May 14-16, 2014
Ort: Ascona, Switzerland
Sprache: English
Schlüsselwort: Traffic operations, MFD, Network modeling, DTA, Grid, Urban planning
DBID Quelle: FORM-1400079292
, Ge, Qiao, Ortigosa, Javier, Menendez, Monica, 2014 >>
Autor(en): Ge, Qiao, Ortigosa, Javier, Menendez, Monica
Titel: Traffic demand pattern generation for a grid network based on experiment design
Kurzbeschreibung: In this paper, we present a preliminary approach for generating different traffic demand patterns to analyze the traffic performance of a grid network. The proposed methodology is based on the sampling strategy proposed in (Ge and Menendez, 2013), and combined with ideas from research on experiment design. The proposed algorithm is illustrated using an abstract grid network with bidirectional streets. The purpose of this paper is to demonstrate how does this algorithm work for investigating the relationship between different spatial distributions of the demand (i.e., geographical position where the demand is generated/attracted) and the traffic performances. In this study, we have tried multiple magnitude of the total demand (i.e., quantity of the demand) in the network, but no variation of the temporal distribution (i.e., time when the demand is generated) is considered. Based on the evaluation of the analysis results, we are able to conclude the best and the worst traffic demand conditions in terms of traffic performance for the given grid network.2
Publikationsdatum / Empfangsdatum: 2014-04-01
Publikations-Status: Ascona
Publikations-Status: Published
Einordnungen: Traffic demand pattern, Network, Experiment design, Traffic performance
Eventname: 14th Swiss Transport Research Conference (STRC 2014)
Eventdatum: May 14-16, 2014
Ort: Monte Verità, Ascona, Switzerland
Sprache: English
Schlüsselwort: Traffic demand pattern, Network, Experiment design, Traffic performance
DBID Quelle: FORM-1400078784
, Ortigosa, Javier, Menendez, Monica, 2014 >>
Autor(en): Ortigosa, Javier, Menendez, Monica
Titel: Traffic performance on quasi-grid urban structures
Kurzbeschreibung: Cities across the world are starting to recover space, previously devoted to cars, for other uses. The main purpose of this paper is to better understand the removal of space in urban settings and to provide some analytical results showing that it is possible to remove streets from a city without worsening traffic excessively. We have created an abstract grid network composed of 100 nodes and bidirectional streets. A simple demand model is applied to load the network effectively, emulating a dense urban environment. We have developed a static traffic assignment model using the Frank–Wolfe algorithm. The link removal strategies seek to represent city planning policies aiming at recovering space for other activities. Links are removed following three different strategies: in a total random manner, focusing on the center of the grid, and focusing on the perimeter of the grid. Up to 30% of the total links of the full grid are removed. The results indicate that a certain number of links can be removed without affecting traffic considerably. As it will be seen, this magnitude is very dependent on the link removal strategy. Our case covers a homogeneous grid with uniform demand where the central links carry higher flow. For that, the peripheral removal allows the highest rate of link removal, whereas the central removal is the most restrictive strategy. The restriction of capacity at intersections is the main bottleneck of the system when links are removed, driving most of the increase in delays. Under these conditions, the peripheral removal retains a higher connectivity in the center, allowing a better distribution of flows.
Publiziert in: Cities
Band: 36
Ausgabe: 2014
Seiten: 18 - 27
ISSN: 0264-2751
Publikationsdatum / Empfangsdatum: 2014-01-01
Publikations-Status: Oxford
Publikations-Status: Published
Einordnungen: Raumordnung, Städtebau, Landschaftsarchitektur|Spatial and Urban Planning, Landscape Architecture, Link removal, Urban pattern, Traffic performance, Grid
Sprache: English
Schlüsselwort: Link removal, Urban pattern, Traffic performance, Grid
DBID Quelle: FORM-1378474921, SCOPUS-84884542922, WOS-000329386100003
DOI: 10.1016/j.cities.2013.08.006
Nebis System Nummer: 001755650
, Ortigosa, Javier, Menendez, Monica, 2014 >>
Autor(en): Ortigosa, Javier, Menendez, Monica
Titel: Analyzing the shape of the Macroscopic Fundamental Diagram on grid urban networks for urban planning purposes
Kurzbeschreibung: In this paper we emulate the dynamics of traffic in three urban grid networks: two way streets, one way streets, and two way streets with prohibited left turns. We pay particular attention to the shape (e.g. height, width, area) of the Macroscopic Fundamental Diagrams (MFD) obtained. We believe that the characteristics of the MFD can also reveal properties of the network to support urban planning and land use policies in urban areas. Hence, we analyze in detail this relationship between urban form and MFD shape and we discuss which should be the optimal MFD shape in an urban network.2
Publikationsdatum / Empfangsdatum: 2014-01-01
Publikations-Status: Barcelona
Publikations-Status: Published
Einordnungen: Transportation, Public Tranport and Traffic, Operations Management
Eventname: 20th Conference of the International Federation of Operational Research Societies (IFORS 2014)
Eventdatum: July 13-18, 2014
Ort: Barcelona, Spain
Sprache: English
Schlüsselwort: Transportation, Public Tranport and Traffic, Operations Management
DBID Quelle: FORM-1420731726
, Ortigosa, Javier, Gayah, Vikash V., Menendez, Monica, 2014 >>
Autor(en): Ortigosa, Javier, Gayah, Vikash V., Menendez, Monica
Titel: Comparison of traffic performance in finite grids with different configurations: analytical versus simulated approach
Kurzbeschreibung: 2
Seiten: 14-3962_C
Publikationsdatum / Empfangsdatum: 2014-01-01
Publikations-Status: S.l.
Publikations-Status: Published
Eventname: 93rd Annual Meeting of the Transportation Research Board
Eventdatum: January 12-16, 2014
Ort: Washington, DC, USA
Sprache: English
DBID Quelle: FORM-1378474235
, Ortigosa, Javier, Gayah, Vikash V., Menendez, Monica, 2014 >>
Autor(en): Ortigosa, Javier, Gayah, Vikash V., Menendez, Monica
Titel: Analysis of one-way and two-way street configurations on urban grid networks
Kurzbeschreibung: The design of urban street networks is a subject of much controversy because there is no consensus on the best way to organize streets to maximize mobility. Debates between one-way and two-way street networks have existed since cars were introduced into urban environments and are still ongoing. In this paper, we provide additional insights on this issue by analyzing traffic behavior on three different street configurations: one-way streets, two-way streets, and two-way streets with prohibited left turns. The outcomes of this paper will furnish urban planners and policy makers with a better understanding of the mobility provided by each of these types of urban street network layouts.

This study is focused on abstract finite grids operating in both uncongested and congested conditions. Analytical formulations are created and used to compare the three network types under low demand scenarios when the network is uncongested. These formulations rely on a fixed traffic assignment scheme in which drivers are assumed to minimize their overall travel distance and number of turning maneuvers. They are used to reveal general insights. In addition, simulation techniques are employed with a static traffic assignment algorithm to examine the behavior of networks under more realistic congested situations.

In general, the study reveals that two-way networks provide the shortest distance traveled and result in more uniform congestion patterns due to route redundancy. However, they are severely penalized by restrictions in capacity at the intersections due to more complicated phasing schemes, which leads to higher average travel times when the network is large, has short links, or is lightly congested. One- way networks offer the longest travel distances but have intersections with very high capacity. They perform better when the network is very large or links are very short. Finally, two-way networks with prohibited left turns provide the best compromise between distance traveled and intersection capacity, which makes them suitable for many different scenarios with low and medium congestion. Their main weakness is that they suffer from inhomogeneous congestion patterns caused by a lack of route redundancy. This could lead to very large travel times when the network is very congested.2
Publiziert in: SVT Working Paper
Band: 75
Publikationsdatum / Empfangsdatum: 2014-01-01
Publikations-Status: Zürich
Publikations-Status: Published
Einordnungen: Urban traffic, Urban network design, Grid, One-way streets, Two-way streets, Prohibited left turns
Sprache: English
Schlüsselwort: Urban traffic, Urban network design, Grid, One-way streets, Two-way streets, Prohibited left turns
DBID Quelle: FORM-1412356733
, Ortigosa, Javier, Gayah, Vikash, Menendez, Monica, 2014 >>
Autor(en): Ortigosa, Javier, Gayah, Vikash, Menendez, Monica
Titel: Comparison of Traffic Performance in Finite Grids with Different Configurations
Untertitel: Analytical Versus Simulated Approach
Publikationsdatum / Empfangsdatum: 2014-01-01
Publikations-Status: Published
Eventname: 93rd Annual Meeting of the Transportation Research Board (TRB 2014)
Eventdatum: January 12-16, 2014
Ort: Washington, DC, USA
Sprache: English
DBID Quelle: FORM-1393332407
, Ortigosa, Javier, Menendez, Monica, 2013 >>
Autor(en): Ortigosa, Javier, Menendez, Monica
Titel: Traffic performance impacts of link removal on a grid urban pattern
Kurzbeschreibung: In this paper the authors explore how the traffic performance of a grid street network changes when links are removed. The objectives are: to better understand the behavior of grid-like patterns when dealing with traffic; to evaluate the effects of link removal in the overall traffic performance; and, to explore how far from the full grid pattern, an urban structure can be still considered one. The authors create an abstract grid network composed of 100 nodes and bidirectional streets. A simple demand model is applied to load the network effectively. The objective is to emulate a dense urban environment. The authors develop a static traffic assignment model using the Frank-Wolfe algorithm. The accuracy of this model has been increased by a more detailed intersection modeling scheme. The link removal strategies seek representing both: operational eventualities (blockage of streets), and, city planning policies aiming at recovering space for other activities. Links are removed in different ways: in a total random manner, focusing on the center of the grid, and, focusing on the perimeter of the grid. Up to 30 % of the total links are removed. As it will be seen, the authors analyze the critical points of a grid system when accommodating traffic. The authors show that it is possible to remove a certain percentage of links without worsening traffic conditions excessively. This magnitude is very dependent on the link removal strategy. The authors believe that these results can be very useful for city and traffic planners.2
Buchtitel: TRB 92nd Annual Meeting Compendium of Papers
Seiten: 13-3851
Publikationsdatum / Empfangsdatum: 2013-01-01
Publikations-Status: S.l.
Publikations-Status: Published
Eventname: 92nd Annual Meeting of the Transportation Research Board
Eventdatum: January 13-17, 2013
Ort: Washington, DC, USA
Sprache: English
DBID Quelle: FORM-1348672066
, Ortigosa, Javier, Gayah, Vikash, Menendez, Monica, 2013 >>
Autor(en): Ortigosa, Javier, Gayah, Vikash, Menendez, Monica
Titel: Study of urban grid configurations
Kurzbeschreibung: The city structure (i.e. urban pattern) serves as the main traffic infrastructure and has a prime role accommodating vehicular traffic: it influences both travel demand, and traffic operations. These interactions have actually shaped cities as we know them today. In this paper, we study traffic operations on a grid network with three possible street configurations: bidirectional streets, bidirectional streets with prohibited left turns, and unidirectional streets. To do so, we analyze an abstract grid network that emulates a dense city environment, and evaluate different demands and network sizes using a static macroscopic traffic assignment model with special focus on the delay at intersections. Our results show that unidirectional grids provide the lowest total travel time for a given number of trips, but also require vehicles to travel more distance, which results in higher flows on the network. Bidirectional grids with prohibited left turns seem to offer the best compromise between travel time and distance travelled of the three network types. These results, however, as it is detailed in the paper, are dependent on the simulation employed, especially on the delay formulation, and the characteristics of the networks studied.
Publikationsdatum / Empfangsdatum: 2013-01-01
Publikations-Status: Published
Eventname: 13th Swiss Transport Research Conference (STRC 2013)
Eventdatum: April 24-26, 2013
Ort: Ascona, Switzerland
Sprache: English
DBID Quelle: FORM-1367330026
, Ortigosa, Javier, Gayah, Vikash, Menendez, Monica, 2013 >>
Autor(en): Ortigosa, Javier, Gayah, Vikash, Menendez, Monica
Titel: Study of urban grid configurations
Publikationsdatum / Empfangsdatum: 2013-01-01
Publikations-Status: Published
Eventname: 13th Swiss Transport Research Conference (STRC 2013)
Eventdatum: April 24-26, 2013
Ort: Ascona, Switzerland
Sprache: English
DBID Quelle: FORM-1369230482, FORM-1369230375
, Menendez, Monica, Ortigosa, Javier, Tapia, H., 2013 >>
Autor(en): Menendez, Monica, Ortigosa, Javier, Tapia, H.
Titel: Study on the location of measurement points for traffic perimeter control
Publikationsdatum / Empfangsdatum: 2013-01-01
Publikations-Status: Published
Sprache: English
DBID Quelle: FORM-1369127521
, Arnet, Kathrin, Ortigosa, Javier, Menendez, Monica, 2012 >>
Autor(en): Arnet, Kathrin, Ortigosa, Javier, Menendez, Monica
Titel: Traffic Management in the Inner City of Zurich
Kurzbeschreibung: 2
Publiziert in: NSL-Newsletter
Band: 14
Publikationsdatum / Empfangsdatum: 2012-06-01
Publikations-Status: Zürich
Publikations-Status: Published
Sprache: English
DBID Quelle: FORM-1345672439
, Ortigosa, Javier, Menendez, Monica, Tapia, H., 2012 >>
Autor(en): Ortigosa, Javier, Menendez, Monica, Tapia, H.
Titel: Study on the location of measurement points for an MFD perimeter control scheme in Zurich
Publiziert in: EURO Journal on Transportation and Logistics
ISSN: 2192-4384, 2192-4376
Publikationsdatum / Empfangsdatum: 2012-01-01
Publikations-Status: Berlin
Publikations-Status: Accepted
Sprache: English
DBID Quelle: FORM-1354367191
, Ortigosa, Javier, Menendez, Monica, Bodenbender, Anne-Kathrin, 2012 >>
Autor(en): Ortigosa, Javier, Menendez, Monica, Bodenbender, Anne-Kathrin
Titel: Link removal on a grid street network
Kurzbeschreibung: This paper explores some properties of a grid street network when accommodating traffic flows under different demand scenarios. The abstract street network considered is a graph defined by nodes and links. The shape of the region is square, therefore the grid is composed of regular squares. Demand is concentrated on the nodes. However, in order to compare different topologies, the total number of trips generated and attracted will be the same independently of the number of nodes (i.e. a model with lesser nodes will concentrate more demand on them). A triangular model, where the trips increase with distance, is proposed. A static macroscopic traffic assignment model has been developed and applied using the Frank-Wolfe algorithm. The travel time is modeled according to the Bureau of Public Roads travel time function, adapted to urban areas. The grid pattern is initially complete (i.e. all the nodes connected according to the grid model). Links are subtracted gradually from the grid in a random manner. For every subtraction, network descriptors are re-calculated. These descriptors are basically related to the density and connectivity of the network (e.g. gamma index). At the same time, for every network configuration, the demand is allocated using the traffic assignment algorithm mentioned above. The traffic performance is then measured using as main inputs the speed and the flows on links, the distance travelled, and the travel time. This iterative process allows us to plot some relationships between the physical characteristics of the network and the traffic performance.
Publikationsdatum / Empfangsdatum: 2012-01-01
Publikations-Status: Ascona
Publikations-Status: Published
Einordnungen: Grid, Traffic performance, Connectivity, Static traffic assignment
Eventname: 12th Swiss Transport Research Conference (STRC 2012)
Eventdatum: May 2-4, 2012
Ort: Ascona, Switzerland
Sprache: English
Review-Status: Peer reviewed
Schlüsselwort: Grid, Traffic performance, Connectivity, Static traffic assignment
DBID Quelle: FORM-1338380962, FORM-1348671109
, Ortigosa, Javier, Menendez, Monica, Bodenbender, Anne-Kathrin, 2012 >>
Autor(en): Ortigosa, Javier, Menendez, Monica, Bodenbender, Anne-Kathrin
Titel: Link removal on a grid street network
Publikationsdatum / Empfangsdatum: 2012-01-01
Publikations-Status: Published
Eventname: 12th Swiss Transport Research Conference (STRC 2012)
Eventdatum: May 2-4, 2012
Ort: Ascona, Switzerland
Sprache: English
DBID Quelle: FORM-1352443333
, Ortigosa, Javier, Arnet, Kathrin, Menendez, Monica, 2012 >>
Autor(en): Ortigosa, Javier, Arnet, Kathrin, Menendez, Monica
Titel: Studying the feasibility of a MFD control in Zürich
Publikationsdatum / Empfangsdatum: 2012-01-01
Publikations-Status: Published
Eventname: 1st European Symposium on Quantitative Methods in Transportation Systems
Eventdatum: September 4-7, 2012
Ort: Lausanne, Switzerland
Sprache: English
DBID Quelle: FORM-1348670284
, Menendez, Monica, Tapia, H., Ortigosa, Javier, 2012 >>
Autor(en): Menendez, Monica, Tapia, H., Ortigosa, Javier
Titel: Macroscopic traffic controls in the city of Zürich
Publikationsdatum / Empfangsdatum: 2012-01-01
Eventname: Vereinigung der Kader des Bundes (VKB) Meeting
Eventdatum: September 2012
Sprache: English
DBID Quelle: FORM-1347888712
, Menendez, Monica, Ortigosa, Javier, 2012 >>
Autor(en): Menendez, Monica, Ortigosa, Javier
Titel: Traffic performance and networks
Publikationsdatum / Empfangsdatum: 2012-01-01
Publikations-Status: Published
Sprache: English
Review-Status: Unknown
DBID Quelle: FORM-1339150526
, Arnet, Kathrin, Ortigosa, Javier, Ge, Qiao, Menendez, Monica, 2012 >>
Autor(en): Arnet, Kathrin, Ortigosa, Javier, Ge, Qiao, Menendez, Monica
Titel: Study of traffic management strategies in the Zürich area
Publikationsdatum / Empfangsdatum: 2012-01-01
Publikations-Status: Published
Eventname: IVT-Alumni-Seminar : Verkehrsingenieurtag 2012
Eventdatum: March 8, 2012
Ort: Zürich, Switzerland
Sprache: English
Review-Status: Unknown
DBID Quelle: FORM-1339151071

 

 

 

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