Traffic Operations and Management

California’s Freeway Service Patrol Program Management: Information System Annual Report Fiscal Year 2003-04

Mauch, Michael
Skabardonis, Alex
2007

The Freeway Service Patrol (FSP) is an incident management program implemented by Caltrans, the California Highway Patrol and local partner agencies to quickly detect and assist disabled vehicles and reduce non-recurring congestion along the freeway during peak commute hours. The first FSP program was piloted in Los Angeles, and was later expanded to other regions by state legislation in 1991. As of June 2004, there were ten participating FSP Programs operating in California, deploying over 315 tow trucks and covering over 1,500 (center-line) miles of congested California freeways.The...

California’s Freeway Service Patrol Program Management: Information System Annual Report Fiscal Year 2006-07

Mauch, Michael
Skabardonis, Alex
2008

The Freeway Service Patrol (FSP) is an incident management program implemented by Caltrans, the California Highway Patrol and local partner agencies to quickly detect and assist disabled vehicles and reduce non-recurring congestion along the freeway during peak commute hours. The first FSP program was piloted in Los Angeles, and was later expanded to other regions by state legislation in 1991. As of June 2007, there were thirteen participating FSP Programs operating in California, deploying over 350 tow trucks and covering over 1,650 (center-line) miles of congested California freeways.The...

California’s Freeway Service Patrol Program: Management Information System Annual Report Fiscal Year 2012-13

Mauch, Michael
Skabardonis, Alex
2013

The Freeway Service Patrol (FSP) is an incident management program implemented by Caltrans, the California Highway Patrol and local partner agencies to quickly detect and assist disabled vehicles and reduce non-recurring congestion along the freeway during peak commute hours. The first FSP program was piloted in Los Angeles, and was later expanded to other regions by state legislation in 1991. As of June 2013, there were fourteen participating FSP Programs operating in California, deploying over 360 tow trucks and covering over 1,800 (center-line) miles of congested California freeways....

California’s Freeway Service Patrol Program: Management Information System Annual Report Fiscal Year 2011-12

Mauch, Michael
Skabardonis, Alex
2013

The Freeway Service Patrol (FSP) is an incident management program implemented by Caltrans, the California Highway Patrol and local partner agencies to quickly detect and assist disabled vehicles and reduce non-recurring congestion along the freeway during peak commute hours. The first FSP program was piloted in Los Angeles, and was later expanded to other regions by state legislation in 1991. As of June 2012, there were fourteen participating FSP Programs operating in California, deploying over 350 tow trucks and covering over 1,750 (center-line) miles of congested California freeways....

Spatio-temporal Road Charge: A Potential Remedy for Increasing Local Streets Congestion

Bayen, Alexandre
Forscher, Teddy
2017

US population. Additionally, the emergence of large ridesourcing or transportation network companies (TNCs) totaling up to tens of thousands of registered drivers in single cities (all using the same routing app), there is further consolidation. Across the US, this has led to new or increased congestion patterns that are progressively asphyxiating local streets due to so-called “cut-through traffic.” As neighborhoods have started to realize this, private citizens have begun to resist, by trying to sabotage or trick the apps, or shaming the through traffic through opinion articles, and news...

Fundamentals of Traffic Engineering - 16th Edition

Homburger, Wolfgang S.
Hall, Jerome W.
Reilly, William R.
Sullivan, Edward C.
2007

This syllabus serves as an introduction to the field of traffic engineering to professionals who are being assigned traffic engineering tasks for the first time and as a source of recent information for those already in the field. It is designed mainly for one-week short courses, but past editions have also seen increasing use in university engineering courses and for individual study. Traffic engineering is an ever-changing profession. New standards, guidelines, and basic texts rapidly replace older reference volumes. This 16th edition again includes new and revised material needed by...

CHAL - Control logic / Hardware Abstraction layer

Zennaro, Marco
Sengupta, Raja
2007

Traffic control systems have reached a high level of sophistication: they are general purpose machines that can, in principle, run any traffic control software. The firmware they are running turns them into special purpose machines able to operate only according to some pre-defined rules. The firmware usually allows limited customizations through parameters, but it does not support the introduction of new control schemes. As a result, implementing a new traffic control scheme requires the re-implementation of the firmware, a complex task given the low-level programming required. The...

Effects of HOV Lanes on Freeway Bottlenecks

Menendez, Monica
Daganzo, Carlos F.
2006

In this paper, the authors report on research that shows that high occupancy vehicle (HOV) lanes do not reduce the capacity of general purpose (GP) lanes. Empirical evidence, complemented with simulations, enable the authors to describe how to estimate total bottneleck capacity and how deploy HOV lanes without hindering vehicle flow. The authors also offer a dynamic strategy that increases a bottleneck's total discharge rate.

Modular Composition of Synchronous Programs: Applications to Traffic Signal Control

Zennaro, Marco
Sengupta, Raja
2006

This paper describes a modular compilation scheme for distributed synchronous programming. The approach is first described mathematically and then implemented as a library to distribute Simulink (59). Application of the scheme is illustrated by developing a control system to coordinate traffic signals.

Macroscopic Relations of Urban Traffic Variables: An Analysis of Instability

Daganzo, Carlos F.
Gayah, Vikash V.
Gonzales, Eric J.
2010

For networks consisting of a single route the Macroscopic Fundamental Diagram (MFD) can be predicted analytically; but when the networks consist of multiple overlapping routes the flows observed in congestion for a given density are less than those one would predict if the routes were homogeneously congested and did not overlap. These types of networks also tend to jam at densities that are only a fraction of their routes’ average jam density. This paper provides an explanation for this phenomena. It shows that, even for perfectly homogeneous networks with spatially uniform travel patterns...