scholarly journals Benefits of Advanced Traffic Management Solutions: Before and After Crash Analysis for Deployment of a Variable Advisory Speed Limit System

2016 ◽  
Author(s):  
Alexander Lindsay Chambers
Keyword(s):  
Traffic Management ◽  
Speed Limit ◽  
Crash Analysis ◽  
Limit System ◽  
Before And After ◽  
Advisory Speed

Development and Field Evaluation of Variable Advisory Speed Limit System for Work Zones

2007 ◽  
Vol 2015 (1) ◽  
pp. 12-18 ◽  
Author(s):  
Eil Kwon ◽  
Daniel Brannan ◽  
Kahled Shouman ◽  
Cassandra Isackson ◽  
Bernie Arseneau
Keyword(s):  
Field Evaluation ◽  
Speed Limit ◽  
Work Zones ◽  
Limit System ◽  
Advisory Speed

scholarly journals Evaluation of Driver Compliance to Displayed Variable Advisory Speed Limit Systems: Comparison between Germany and the U.S.

2016 ◽  
Vol 15 ◽  
pp. 640-651 ◽  
Author(s):  
Gary Riggins ◽  
Robert Bertini ◽  
Williams Ackaah ◽  
Martin Margreiter
Keyword(s):  
Speed Limit ◽  
Advisory Speed ◽  
The U.S

Rural Variable Speed Limit System for Southeast Wyoming

2010 ◽  
Vol 2189 (1) ◽  
pp. 37-44 ◽  
Author(s):  
Jenna Buddemeyer ◽  
Rhonda K. Young ◽  
Brendan Dorsey-Spitz
Keyword(s):  
Speed Limit ◽  
Variable Speed ◽  
Variable Speed Limit ◽  
Limit System

scholarly journals The Effects of ITS Application in Speed Management on State Road From Mali Pozarevac to Kragujevac

2016 ◽  
Vol 1 (1) ◽  
Author(s):  
Tomislav Petrović ◽  
Miloš Milosavljević ◽  
Milan Božović ◽  
Danislav Drašković ◽  
Milija Radović
Keyword(s):  
Traffic Safety ◽  
Traffic Management ◽  
Quality Data ◽  
Transport Systems ◽  
Speed Limit ◽  
Accident Risk ◽  
The Road ◽  
Road Users ◽  
Speed Management ◽  
On The Road

The application of intelligent transport systems (hereinafter ITSs) on roads enables continuous monitoring of road users during a whole year with the aim to collect good-quality data based on which the more complex analyses could be done, such as monitoring of certain traffic safety indicators. Automatic traffic counters are one of the most commonly implemented ITSs for collecting traffic flow parameters that are relevant for traffic management on state roads in Republic of Serbia. This paper presents one of the possible ways to collect, analyze and present data on road users’ speeds using automatic traffic counters, where certain traffic safety indicators are analyzed in terms of road users’ compliance with the speed limit on the road section from Mali Pozarevac to Kragujevac. Based on the analyses of data downloaded from automatic traffic counters, it is observed that an extremely high percentage of vehicles drive at speed higher than the speed limit, indicating clearly to higher traffic accident risk, as well as to the need for a tendency to implement speed management on roads using ITS in the forthcoming period.

Lowering the speed limit from 30 mph to 25 mph in Boston: effects on vehicle speeds

2019 ◽  
Vol 26 (2) ◽  
pp. 99-102 ◽  
Author(s):  
Wen Hu ◽  
Jessica B Cicchino
Keyword(s):  
Rhode Island ◽  
Local Communities ◽  
Speed Limit ◽  
Speed Limits ◽  
State Laws ◽  
Logistic Regression Models ◽  
Road Users ◽  
Before And After ◽  
Flow Speeds ◽  
Log Linear

IntroductionEffective 9 January 2017, the default speed limit on Boston streets was reduced from 30 mph to 25 mph. This study evaluated the effects of the speed limit reduction on speeds in Boston.MethodVehicle speeds were collected at sites in Boston where the speed limit was lowered, and at control sites in Providence, Rhode Island, where the speed limit remained unchanged, before and after the speed limit change in Boston. A log-linear regression model estimated the change in vehicle speeds associated with the speed limit reduction. Separate logistic regression models estimated changes in the odds of vehicles exceeding 25 mph, 30 mph and 35 mph associated with the lower speed limit.ResultsThe speed limit reduction was associated with a 0.3 % reduction in mean speeds (p=0.065), and reductions of 2.9%, 8.5% and 29.3 % in the odds of vehicles exceeding 25 mph, 30 mph and 35 mph, respectively. All these reductions were statistically significant.ConclusionsLocal communities should consider lowering speed limits to reduce speeds and improve safety for all road users. The current practice of setting speed limits according to the 85th percentile free-flow speeds, without consideration of other characteristics of the roadway, can be a hurdle for local communities looking to lower speed limits. Updated state laws that allow municipalities to set lower speed limits on urban streets without requiring costly engineering studies can provide flexibility to municipalities to set speed limits that are safe for all road users.

Performance Measurement for Traffic Management Systems

1998 ◽  
Vol 1634 (1) ◽  
pp. 39-45 ◽  
Author(s):  
James H. Banks
Keyword(s):  
Performance Measurement ◽  
Traffic Management ◽  
Evaluation Studies ◽  
Traffic Information ◽  
Management Systems ◽  
Management Actions ◽  
Institutional Infrastructure ◽  
Before And After ◽  
Incident Duration ◽  
Traffic Volumes

Performance measurement refers to attempts to quantify some aspect of the performance of an organization. A study was conducted to analyze needs, opportunities, and techniques for measuring performance of transportation management centers (TMCs). Opportunities and needs were identified by analyzing the interrelationships among performance measurement objectives, objects, and study designs. This analysis suggests that before-and-after evaluation studies of traffic management actions and monitoring of traffic data to detect system changes are the most appropriate forms of performance measurement for TMCs. Important potential measures of effectiveness for traffic management systems include travel time and related measures, ramp delay, traffic volumes, accident rates, traffic information accuracy, incident duration, and equipment status. Techniques are available for quantifying these measures, although there are a number of concerns with data accuracy, especially where travel times are estimated from loop-detector data. Case studies of two California TMCs suggest that, although sophisticated data collection systems are available or planned, the institutional infrastructure to carry out performance measurement may be lacking.

Sign in / Sign up

Export Citation Format

Share Document