Traffic Operations and Management

Dynamic Stochastic Optimization Models for Air Traffic Flow Management

Mukherjee, Avijit
2004

This dissertation presents dynamic stochastic optimization models for Air Traffic Flow Management (ATFM) that enables decisions to adapt to new information on evolving capacities of National Airspace System (NAS) resources. Uncertainty is represented by a set of capacity scenarios, each depicting a particular time-varying capacity profile of NAS resources. We use the concept of a scenario tree in which multiple scenarios are possible initially. Scenarios are eliminated as possibilities in a succession of branching points, until the specific scenario that will be realized on a particular...

California’s Freeway Service Patrol Program Management: Information System Annual Report Fiscal Year 2004-05

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 2005, 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 2014-2015

Mauch, Michael
Skabardonis, Alexander
2016

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 2015, there were fourteen participating FSP Programs operating in California, deploying over 340 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 2013-14

Mauch, Michael
Skabardonis, Alex
2015

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 2014, there were fourteen participating FSP Programs operating in California, deploying over 370 tow trucks and covering over 1,800 (center-line) miles of congested California freeways....

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...

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.

Evaluation of Traffic Data Obtained via GPS-Enabled Mobile Phones: the Mobile Century Field Experiment

Herrera, Juan C.
Work, Daniel B.
Herring, Ryan
Ban, Xuegang (Jeff)
Bayen, Alexander M.
2009

The growing need of the driving public for accurate traffic information has spurred the deployment of large scale dedicated monitoring infrastructure systems, which mainly consist in the use of inductive loop detectors and video cameras. On-board electronic devices have been proposed as an alternative traffic sensing infrastructure, as they usually provide a cost-effective way to collect traffic data, leveraging existing communication infrastructure such as the cellular phone network. A traffic monitoring system based on GPS-enabled smartphones exploits the extensive coverage provided by...

Rural Road Links: A Review on Current Research Projects & Initiatives Aimed at Reducing Vehicle Crash Fatalities on Rural Roads

Quiros, Lesliam
Shaver, Barrett
2003

Rural America accounts for a smaller and more dispersed portion of the nation’s population, yet it comprises a considerable portion of the transportation system. Rural areas account for approximately 83 percent of the land in the U.S and their roads account for 80 percent of the total U.S. road mileage and 40 percent of the vehicle miles traveled. Fatalities on rural roads surpass those in urban areas, even though urban areas are more densely populated and consequently, have a higher traffic flow. In 2001 alone, fatal crashes on rural areas accounted for 61 percent of all traffic...

Development and Application of the San Francisco Pedestrian Intersection Volume Model

Schneider, Robert J.
Henry, Todd
Mitman, Meghan F.
Stonehill, Laura
Koehler, Jesse
2013

The San Francisco pedestrian volume modeling process refined the methodology used to develop previous intersection-based models and incorporated variables that were tailored to estimate walking activity in the local urban context. The methodology included two main steps. First, manual and automated pedestrian counts were taken at a sample of 50 study intersections with a variety of characteristics. A series of factor adjustments were applied to produce an annual pedestrian crossing estimate at each intersection. Second, log-linear regression modeling was used to identify statistically-...