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Modeling effort shows Active Transportation Management systems can reduce average morning travel time by 21 percent on the I-270 corridor.

FINDINGSA scenario that featured only the use of VSL found a delay reduction of 7.6 percent in the morning and 2 percent in the evening when compared with the base case, with both effects being…

04/16/2019

Taxonomy: Speed Enforcement, Ramp Metering

In a recurring congestion scenario, ramp metering, variable speed limits, and hard shoulder running found to improve corridor travel time and network performance by 5 to 16 percent.

FINDINGSFor the recurring congestion scenario, ramp metering, variable speed limits, and hard shoulder running were found to improve the corridor travel time and network performance for the selected…

12/26/2018

Taxonomy: Lane Control, Variable Speed Limits, Ramp Metering, Traffic

Ramp metering and dynamic speed limits shown to reduce congestion and shorten average travel times by about 2.5 minutes on a 7.8 km stretch of the A25 motorway in France.

FINDINGSAverage travel time was reduced with each implementation of ATM measures. The travel time differences of 95 seconds (when passing from No Control to Ramp Metering) and 56 s (when passing from…

09/26/2018

Taxonomy: Variable Speed Limits, Ramp Metering

When combined, ramp metering and variable speed limits may reduce conflicts by 16.5 percent and crash odds by 6.0 percent in weaving segments.

FindingsOverall, the results showed that these ATM strategies could improve the safety of the weaving segment. The combined RM-VSL strategy reduced conflicts by 16.8 percent and decreased crash odds…

03/20/2018

Taxonomy: Variable Speed Limits, Ramp Metering

Simulation models show that roadside information used to gap-meter mainline traffic near freeway on-ramps can reduce delays related to merging traffic by 17 to 27 percent.

FindingsThe results suggest the potential of using gap metering as an effective strategy addressing traffic congestion caused by merging traffic. Gap metering yields delay reductions of 17 to 27…

03/20/2018

Taxonomy: Lane Management, Ramp Metering

Ramp metering system improved delay by 25 percent and reduced crashes by 22 percent per ramp meter in Auckland, New Zealand.

Findings On average, at each ramp site, the SRMS annual benefit yield includes a reduction in 26,000 hours of delay (25 percent improvement) and a reduction of 6 crashes (22 percent improvement).…

02/20/2018

Taxonomy: Ramp Metering

Dynamic ramp metering strategies designed to actively counter developing bottlenecks can reduce vehicle delay up to 48 percent.

FINDINGS Results of the field test indicated substantial improvements in both mainline and ramp traffic performance as compared to the old strategy that used a stratified algorithm. By dynamically…

04/20/2017

Taxonomy: Ramp Metering

Full deployment of comprehensive ITS strategies in Seattle are projected to reduce CO, HC, and NOx emissions by 16 percent, 17 percent and 21 percent, respectively and reduce fuel consumption by 19 percent.

BenefitsThe ITS improvements would result in decreased vehicle pollutants and reduced fuel use in the Seattle area. Full deployment would result in a reduction for all emissions analyzed. Carbon…

02/09/2016

Taxonomy: Advanced Signal Systems, Ramp Metering, Surveillance & Detection

Full ITS deployment in the Seattle area projected to reduce recurrent congestion delays by 3.2 percent and incident related delays by 50 percent.

BenefitsThe ITS deployment was shown to improve system speeds and reduce delay, particularly during congested, delay-prone commute hours. Overall reduction in delay caused by recurring congestion was…

02/09/2016

Taxonomy: Advanced Signal Systems, Ramp Metering, Surveillance & Detection

Full ITS deployment in Seattle projects vehicle speeds to increase by as much as 12 percent on major roadways.

BenefitsOverall, vehicle speeds on Seattle's road network increased by less than 1 percent on a daily basis as a result of the ITS deployments. The majority of the speed increase was observed on…

02/09/2016

Taxonomy: Advanced Signal Systems, Ramp Metering, Surveillance & Detection

Displaying 1 - 10 of 51

Modeling effort shows Active Transportation Management systems can reduce average morning travel time by 21 percent on the I-270 corridor.

In a recurring congestion scenario, ramp metering, variable speed limits, and hard shoulder running found to improve corridor travel time and network performance by 5 to 16 percent.

Ramp metering and dynamic speed limits shown to reduce congestion and shorten average travel times by about 2.5 minutes on a 7.8 km stretch of the A25 motorway in France.

When combined, ramp metering and variable speed limits may reduce conflicts by 16.5 percent and crash odds by 6.0 percent in weaving segments.

Simulation models show that roadside information used to gap-meter mainline traffic near freeway on-ramps can reduce delays related to merging traffic by 17 to 27 percent.

Ramp metering system improved delay by 25 percent and reduced crashes by 22 percent per ramp meter in Auckland, New Zealand.

Dynamic ramp metering strategies designed to actively counter developing bottlenecks can reduce vehicle delay up to 48 percent.

Full deployment of comprehensive ITS strategies in Seattle are projected to reduce CO, HC, and NOx emissions by 16 percent, 17 percent and 21 percent, respectively and reduce fuel consumption by 19 percent.

Full ITS deployment in the Seattle area projected to reduce recurrent congestion delays by 3.2 percent and incident related delays by 50 percent.

Full ITS deployment in Seattle projects vehicle speeds to increase by as much as 12 percent on major roadways.

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