Safety

I-880 Field Experiment: Analysis of Incidnet Data

Skabardonis, A
Petty, K F
Bertini, Robert L
Varaiya, P P
Noeimi, H
Rydzewski, D
Transportation Research Board
1997

The I-880 field experiment has produced one of the largest data bases on incidents and freeway traffic-flow characteristics ever compiled. Field data on incidents were collected through observations of probe-vehicle drivers before and after the implementation of freeway service patrols (FSPs) over a freeway section. Supplementary information was collected from the California Highway Patrol's computer-aided dispatch system, FSPs, and tow-truck company logs. The incident patterns are described and the major factors affecting incident frequency and duration are identified. FSPs significantly...

Evaluation of the Freeway Service Patrol (FSP) in Los Angeles

Skabardonis, Alexander
University of California, Berkeley
1998

This report presents the results of a study designed to evaluate the effectiveness of the freeway service patrols (FSP) on a section of I-10 in Los Angeles. An evaluation methodology was used to estimate incident delays based on loop detector data and probe vehicles, and derive estimates of savings in performance measures in the absence of data for before FSP conditions. The estimated benefit cost ratios based on delay and fuel savings for a range of typical reductions in incident durations indicate that FSP produces significant benefits at the test site. Additional benefits include...

Evaluation of the Bay Area Incident Response System (BAIRS)

Mauch, Michael
Chung, Koohong
Ahn, Soyoung
Skabardonis, Alexander
California Department of Transportation
University of California, Berkeley
2006

The Bay Area Incident Response System (BAIRS) is an integrated web and geographic information system (GIS) based incident tracking system. It provides tools for improving the California Department of Transportation (Caltrans) incident management capabilities. This report presents findings from the evaluation of the BAIRS system using field data on incidents and traffic conditions. As a results of the implementation of BAIRS, incident response and clearance times were reduced by close to 15%. Incident related delays were reduced by 210,000 vehicle-hours annually. The estimated BAIRS benefit...

Evaluation of Methodologies for the Design and Analysis of Freeway Weaving Sections

Skabardonis, Alexander
Christofa, Eleni
2011

Weaving sections are common design elements on freeway facilities such as near ramps and freeway-to-freeway connectors. Traffic operational problems often exist at weaving areas even when traffic demands are less than capacity because of the complexity of vehicle interactions, resulting in poor level of service (LOS) and potential safety problems. The objective of the work described in this paper is to evaluate the new weaving analysis methodology developed for the forthcoming edition of the Highway Capacity Manual (HCM2010). The authors applied the method to 30 real-world weaving sections...

California’s Freeway Service Patrol Program: Management Information Systems Annual Report Fiscal Year 2015-2016

Mauch, Michael
Skabardonis, Alex
2017

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 2016, 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 2020-21

Mauch, Michael
Skabardonis, Alex
2022

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 2020, there were sixteen participating FSP Programs operating in California, deploying 305 tow trucks and covering over 1,900 (centerline) miles of congested California...

California’s Freeway Service Patrol Program: Management Information System Annual Report Fiscal Year 2019-20

Mauch, Michael
Skabardonis, Alex
2021

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 2019, there were fourteen participating FSP Programs operating in California, deploying 338 tow trucks and covering over 1,806 (centerline) miles of congested California freeways.&nbsp...

California’s Freeway Service Patrol Program: Management Information System Annual Report Fiscal Year 2017-18

Mauch, Michael
Skabardonis, Alex
2019

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 2018, there were fourteen participating FSP Programs operating in California, deploying 318 tow trucks and covering over 1,725 (center-line) miles of congested California freeways. The...

California’s Freeway Service Patrol Program: Management Information System Annual Report Fiscal Year 2016-17

Skabardonis, Alex
Mauchm, Michael
2018

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 2017, there were fourteen participating FSP Programs operating in California, deploying 324 tow trucks and covering over 1,718 (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....