Freeway Management (71 unique benefit summaries found)
In Finland, a benefit-cost analysis supported the deployment of weather information controlled variable speed limits on highly trafficked road segments.(25 March 2006)
A model indicated that an advanced transportation management and traveler information system serving northern Kentucky and Cincinnati reduced crash fatalities by 3.2 percent during peak periods.(4-7 June 2001)
Modeling indicated that an advanced transportation management and traveler information system serving northern Kentucky and Cincinnati reduced delay by 0.2 minutes per trip during AM peak periods and by 0.6 minutes during PM peak periods. (4-7 June 2001)
Modeling found emissions reductions of 3.7 to 4.6 percent due to an advanced transportation management and traveler information system serving northern Kentucky and Cincinnati.(4-7 June 2001)
A simulation study of the road network in Seattle, Washington demonstrated that providing information on arterials as well as freeways in a traveler information system reduced vehicle-hours of delay by 3.4 percent and reduced the total number of stops by 5.5 percent.(6-9 November 2000)
A simulation study of the road network in Seattle, Washington demonstrated that providing information on arterials as well as freeways in a traveler information system increased throughput by 0.1 percent.(6-9 November 2000)
A simulation study indicated that vehicle throughput would increase if arterial data were integrated with freeway data in an Advanced Traveler Information System in Seattle, Washington. (September 1999)
A simulation study indicated that integrating traveler information with traffic and incident management systems in Seattle, Washington could reduce emissions by 1 to 3 percent, lower fuel consumption by 0.8 percent, and improve fuel economy by 1.3 percent.(September 1999)
A simulation study indicated that integrating traveler information with traffic and incident management systems in Seattle, Washington could diminish delay by 1 to 7 percent, reduce stops by about 5 percent, lower travel time variability by 2.5 percent, and improve trip time reliability by 1.2 percent.(September 1999)
Advanced traffic management systems in Amsterdam and Germany reduced crash rates by 20 to 23 percent.(August 1999)
More than 99 percent of surveyed users said they benefited from information provided by an advanced transportation management system and traveler information system serving northern Kentucky and Cincinnati. (June 1999)
Evaluation Report for ITS for Voluntary Emission Reduction: An ITS Operational Test for Real-Time Vehicle Emissions Detection(May 1997)
In Toronto, the COMPASS traffic monitoring and incident information dissemination system on Highway 401 decreased the average incident duration from 86 to 30 minutes per incident.(1997)
In Long Island, New York, ramp metering and traveler information increased freeway speeds by 13 percent despite an 5 percent increase in vehicle-miles traveled during PM peak periods.(January 1992)
Integrated Corridor Management (ICM) strategies that promote integration among freeways, arterials, and transit systems can help balance traffic flow and enhance corridor performance; simulation models indicate benefit-to-cost ratios for combined strategies range from 7:1 to 25:1.(2009)
In Salt Lake Valley, Utah a ramp metering study showed that with an 8 second metering cycle, mainline peak period delay decreased by 36 percent, or 54 seconds per vehicle.(March 2004)
In Minneapolis-St.Paul, an evaluation of the effectiveness of ramp meters on four test corridors showed that the number of commuters who supported a complete ramp meter shutdown declined significantly from 21 percent in 2000 to about 14 percent in 2001.(10 May 2002)
In Minneapolis-St.Paul, an evaluation of the effectiveness of ramp meters on four test corridors showed that freeway travel speeds decreased 5 to 10 percent and freeway travel times increased 5 to 10 percent between 2000 and 2001.(10 May 2002)
In Minneapolis-St.Paul, an evaluation of the effectiveness of ramp meters on four test corridors showed that the number of crashes recorded for the interim period with reduced ramp metering capacity was 15 percent higher that the average number of crashes measured for the previous fully metered periods. (10 May 2002)
The CORSIM simulation model has been used to estimate ramp metering speed improvements at the merge influence area under different ramp and mainline volumes, acceleration lane lengths, and number of lanes conditions, and the simulated outputs show that the average speeds at the merge influence areas increase when on-ramp junctions are metered, and that the increase is most prevalent under high traffic volumes, short acceleration lane, and low number of mainline lanes. (13-18 January 2002)
A simulation study in Minneapolis-St. Paul estimated that ramp metering decreased total system travel time by 6 to16 percent and increased average mainline speeds by 13 to 26 percent.( 13-17 January 2002)
A simulation study in Minneapolis-St. Paul estimated that ramp metering saved 2 to 55 percent of the fuel expended at each ramp.( 13-17 January 2002)
Simulations indicated that using a decision support tool to select alternative traffic control plans during non-recurring congestion in the Disney Land area of Anaheim, California could reduce travel time by 2 to 29 percent and decrease stop time by 15 to 56 percent. (December 2001)
A simulation study of existing ITS (traveler information, ramp metering, and DMS) on a Detroit freeway demonstrated how these technologies can increase average vehicle speed, decreased average trip time, and reduce commuter delay by as much as 22 percent.(July 2001)
A simulation study of existing ITS (traveler information, ramp metering, and DMS) on a Detroit freeway demonstrated how these technologies were beneficial to corridor capacity.(July 2001)
Most drivers believed that traffic conditions worsened when the Minneapolis-St. Paul ramp metering system was shut down and 80 percent supported reactivation.(February 2001)
When the ramp metering system on Minneapolis-St. Paul freeways was shut down, speeds fell by seven percent. (February 2001)
When the ramp metering system on Minneapolis-St. Paul freeways was deactivated, crash frequency increased by 26 percent.(February 2001)
Net annual vehicle emissions increased by 1,160 tons and fuel consumption decreased by 5.5 million gallons when the ramp metering system on Minneapolis-St. Paul freeways was shut down.(February 2001)
Volume decreased by 9 percent and peak period throughput was reduced by 14 percent when the ramp metering system on Minneapolis-St. Paul freeways was deactivated.(February 2001)
A study found that the benefit-to-cost ratio of the Minneapolis-St. Paul ramp metering system was 15:1.(February 2001)
Adaptive signal control integrated with freeway ramp meters in Glasgow, Scotland increased vehicle throughput 20 percent on arterials and 6 percent on freeways.(January 2000)
A survey of drivers in Glasgow, Scotland, found that 59 percent of respondents thought that ramp metering was very helpful or fairly helpful.(January 2000)
Adaptive signal control integrated with freeway ramp meters in Glasgow, Scotland improved network travel times by 10 percent.(January 2000)
A six year evaluation of freeway ramp metering in Arizona found that that the system reduced sideswipe accidents on the mainline by smoothing traffic flow, but increased rear-end accidents on entrance ramps where vehicles were required to slow down or stop unexpectedly.(August 1999)
In Glasgow, Scotland a freeway ramp metering system installed at an entrance ramp to the M8 motorway reduced the frequency of early merging by 29 percent.(12-16 October 1998)
In the St. Paul, Minnesota region ramp metering has increased throughput by 30 percent and increased peak period speeds by 60 percent.(November 1997)
The delay reduction benefits of improved incident management in the Greater Houston area saved motorists approximately $8,440,000 annually.
(7 February 1997)
A 1995 North American survey of traffic management centers using ramp metering, identified reductions of 15 to 50 percent in freeway crashes.(June 1995)
In Europe, ITS evaluation reports show that ramp metering can improve freeway capacity by 5 to 13 percent.(1994-1998)
In Long Island, New York, ramp metering and traveler information increased freeway speeds by 13 percent despite an 5 percent increase in vehicle-miles traveled during PM peak periods.(January 1992)
Integrated Corridor Management (ICM) strategies that promote integration among freeways, arterials, and transit systems can help balance traffic flow and enhance corridor performance; simulation models indicate benefit-to-cost ratios for combined strategies range from 7:1 to 25:1.(2009)
The delay reduction benefits of improved incident management in the Greater Houston area saved motorists approximately $8,440,000 annually.
(7 February 1997)
It was estimated that variable speed limit signs and lane control signals installed on the autobahn in Germany would generate cost savings due to crash reductions that would be equal to the cost of the system within two to three years of deployment. (August 1999)
Advanced traffic management systems in Amsterdam and Germany reduced crash rates by 20 to 23 percent.(August 1999)
Integrated Corridor Management (ICM) strategies that promote integration among freeways, arterials, and transit systems can help balance traffic flow and enhance corridor performance; simulation models indicate benefit-to-cost ratios for combined strategies range from 7:1 to 25:1.(2009)
On the Køge Bugt Motorway in Copenhagen, Denmark, variable speed limits reduced vehicle speeds by up to 5 km/h and contributed to smoother traffic flow during peak periods.(8 April 2003)
A survey of motorists in Copenhagen, Denmark, found that 80 percent of respondents were satisfied with variable speed limits and the traveler information posted on dynamic message signs.(8 April 2003)
A study of travelers on Snoqualmie Pass, WA found that DMS can decrease mean driving speeds and reduce accident severity.(December 2001)
It was estimated that variable speed limit signs and lane control signals installed on the autobahn in Germany would generate cost savings due to crash reductions that would be equal to the cost of the system within two to three years of deployment. (August 1999)
Advanced traffic management systems in Amsterdam and Germany reduced crash rates by 20 to 23 percent.(August 1999)
Integrated Corridor Management (ICM) strategies that promote integration among freeways, arterials, and transit systems can help balance traffic flow and enhance corridor performance; simulation models indicate benefit-to-cost ratios for combined strategies range from 7:1 to 25:1.(2009)
In Houston, a survey of motorists found that 85 percent of respondents changed their route after viewing real-time travel time information on freeway dynamic message signs.(May 2005)
Deployment experiences document the importance of traveler information and list top sources of traveler information.(2005)
In Southeast Pennsylvania, survey results indicated that users of the SmarTraveler website were more likely to use the service again compared to users of the SmarTraveler telephone service.(19-22 May 2003)
On the Køge Bugt Motorway in Copenhagen, Denmark, travel times and alternative route information posted on dynamic message signs prompted 12 to 14 percent of drivers to divert onto less congested alternative routes.(8 April 2003)
A survey of motorists in Copenhagen, Denmark, found that 80 percent of respondents were satisfied with variable speed limits and the traveler information posted on dynamic message signs.(8 April 2003)
Intelligent Transportation Systems at the 2002 Salt Lake City Winter Olympic Games: Event Study Traffic Management and Traveler Information(April 2003)
Evaluation of Variable Message Signs in Wisconsin: Driver Survey(May 2002)
Simulations indicated that using a decision support tool to select alternative traffic control plans during non-recurring congestion in the Disney Land area of Anaheim, California could reduce travel time by 2 to 29 percent and decrease stop time by 15 to 56 percent. (December 2001)
A simulation study of existing ITS (traveler information, ramp metering, and DMS) on a Detroit freeway demonstrated how these technologies can increase average vehicle speed, decreased average trip time, and reduce commuter delay by as much as 22 percent.(July 2001)
A simulation study of existing ITS (traveler information, ramp metering, and DMS) on a Detroit freeway demonstrated how these technologies were beneficial to corridor capacity.(July 2001)
A model indicated that an advanced transportation management and traveler information system serving northern Kentucky and Cincinnati reduced crash fatalities by 3.2 percent during peak periods.(4-7 June 2001)
Modeling indicated that an advanced transportation management and traveler information system serving northern Kentucky and Cincinnati reduced delay by 0.2 minutes per trip during AM peak periods and by 0.6 minutes during PM peak periods. (4-7 June 2001)
Modeling found emissions reductions of 3.7 to 4.6 percent due to an advanced transportation management and traveler information system serving northern Kentucky and Cincinnati.(4-7 June 2001)
A simulation study of the road network in Seattle, Washington demonstrated that providing information on arterials as well as freeways in a traveler information system reduced vehicle-hours of delay by 3.4 percent and reduced the total number of stops by 5.5 percent.(6-9 November 2000)
A simulation study of the road network in Seattle, Washington demonstrated that providing information on arterials as well as freeways in a traveler information system increased throughput by 0.1 percent.(6-9 November 2000)
Simulation revealed that a freeway management system in Fargo, North Dakota could reduce network travel times by 8 percent and increase speeds by 8 percent when DMS are used to warn drivers of incidents.(6-10 August 2000)
In Arizona and Missouri a survey of tourists found that those who used advanced traveler information systems believed the information they received save them time.(30 June 2000)
Modeling performed as part of an evaluation of nine ITS implementation projects in San Antonio, Texas indicated that integrating DMS, incident management, and arterial traffic control systems could reduce delay by 5.9 percent.(May 2000)
Evaluation indicated that integrating DMS and incident management systems could reduce crashes by 2.8 percent, and that integrating DMS and arterial traffic control systems could decrease crashes by 2 percent, in San Antonio, Texas.(May 2000)
In San Antonio, Texas, focus group participants felt that DMS were a reliable source of traffic information.(May 2000)
Evaluation of freeway DMS integrated with incident management in San Antonio, Texas, found fuel consumption reduced by 1.2 percent; integrating the DMS with arterial traffic control systems could save 1.4 percent. (May 2000)
An evaluation of traffic information used by travelers in the Detroit area, in 2000, found that most drivers perceived commercial radio as "more reliable" than television or dynamic message sign information. (May 2000)
A survey of drivers in Glasgow, Scotland, found that 40 percent changed route due to DMS recommendations.(January 2000)
A simulation study indicated that vehicle throughput would increase if arterial data were integrated with freeway data in an Advanced Traveler Information System in Seattle, Washington. (September 1999)
A simulation study indicated that integrating traveler information with traffic and incident management systems in Seattle, Washington could reduce emissions by 1 to 3 percent, lower fuel consumption by 0.8 percent, and improve fuel economy by 1.3 percent.(September 1999)
A simulation study indicated that integrating traveler information with traffic and incident management systems in Seattle, Washington could diminish delay by 1 to 7 percent, reduce stops by about 5 percent, lower travel time variability by 2.5 percent, and improve trip time reliability by 1.2 percent.(September 1999)
It was estimated that variable speed limit signs and lane control signals installed on the autobahn in Germany would generate cost savings due to crash reductions that would be equal to the cost of the system within two to three years of deployment. (August 1999)
Advanced traffic management systems in Amsterdam and Germany reduced crash rates by 20 to 23 percent.(August 1999)
In Japan, real-time alternative-route travel time information posted on dynamic message signs contributed to a 3.7 percent divergence rate during periods of congestion, saving detoured motorists an average of 9.8 minutes per vehicle.(12-16 October 1998)
Evaluation Report for ITS for Voluntary Emission Reduction: An ITS Operational Test for Real-Time Vehicle Emissions Detection(May 1997)
In Toronto, the COMPASS traffic monitoring and incident information dissemination system on Highway 401 decreased the average incident duration from 86 to 30 minutes per incident.(1997)
In Long Island, New York, ramp metering and traveler information increased freeway speeds by 13 percent despite an 5 percent increase in vehicle-miles traveled during PM peak periods.(January 1992)
In a mountainous region of Spokane, Washington, about one-third of CVOs interviewed would consider changing routes based on the information provided on a road weather information website and highway advisory radio system; however, few could identify viable alternate routes.
(8 January 2004)
Intelligent Transportation Systems at the 2002 Salt Lake City Winter Olympic Games: Event Study Traffic Management and Traveler Information(April 2003)
A simulation study of existing ITS (traveler information, ramp metering, and DMS) on a Detroit freeway demonstrated how these technologies can increase average vehicle speed, decreased average trip time, and reduce commuter delay by as much as 22 percent.(July 2001)
A simulation study of existing ITS (traveler information, ramp metering, and DMS) on a Detroit freeway demonstrated how these technologies were beneficial to corridor capacity.(July 2001)
A simulation study of the road network in Seattle, Washington demonstrated that providing information on arterials as well as freeways in a traveler information system reduced vehicle-hours of delay by 3.4 percent and reduced the total number of stops by 5.5 percent.(6-9 November 2000)
A simulation study of the road network in Seattle, Washington demonstrated that providing information on arterials as well as freeways in a traveler information system increased throughput by 0.1 percent.(6-9 November 2000)
In Arizona and Missouri a survey of tourists found that those who used advanced traveler information systems believed the information they received save them time.(30 June 2000)
A simulation study indicated that vehicle throughput would increase if arterial data were integrated with freeway data in an Advanced Traveler Information System in Seattle, Washington. (September 1999)
A simulation study indicated that integrating traveler information with traffic and incident management systems in Seattle, Washington could reduce emissions by 1 to 3 percent, lower fuel consumption by 0.8 percent, and improve fuel economy by 1.3 percent.(September 1999)
A simulation study indicated that integrating traveler information with traffic and incident management systems in Seattle, Washington could diminish delay by 1 to 7 percent, reduce stops by about 5 percent, lower travel time variability by 2.5 percent, and improve trip time reliability by 1.2 percent.(September 1999)
Seventy (70) percent of survey respondents in Great Britain thought that automated speed and red-light enforcement cameras were a useful way to reduce accidents and save lives. ( 11 February 2003)
In Great Britain, automated speed and red-light enforcement reduced the percentage of vehicles exceeding the speed limit by 58 percent, the number of persons killed or seriously injured by 4 to 65 percent, and the personal injury accident rate by 6 percent.( 11 February 2003)
Evaluation studies in Canada, the Netherlands, and Australia showed that roadways equipped with automated speed enforcement can reduce the number of speeding vehicles by 27 to 78 percent.(13-17 January 2002)
In Texas, police who used remote camera/radar systems to enforce work zone speed limits noted improved safety to officers, but expressed some concern over effectiveness in identifying speeding vehicles.(13-17 January 2002)
In Brazilian cities, automated speed and red light enforcement lowered crash frequency by 14 percent, decreased crash injuries by 19 to 98 percent, and fatalities 7 to 83 percent.(2001)
Automated speed enforcement in England has increased capacity by 5 to 10 percent. (August 1999)
An automated speed enforcement system deployed in Korea reduced crash frequency by 28 percent and decreased crash fatalities by 60 percent. (12-16 October 1998)
A survey of travelers in the Washington, DC region indicated that 86 percent favored the use of video technology to enforce aggressive driving laws.(11 September 1998)
In England, an variable speed limit system on the M25 freeway increases average travel times, but promotes proper following distances between vehicles and creates smoother traffic flow.(14 March 1997)
In Norway, automated speed enforcement systems decreased injury accidents by 5 to 26 percent.(1997)
Increase of Traffic Safety by Surveillance of Speed Limits with Automatic Radar-Devices on a Dangerous Section of a German Autobahn: A Long-Term Investigation(1984)
