Roadway Operations & Maintenance (53 unique benefit summaries found)
A Kansas DOT survey of State and local transportation agencies found that AVL applications for highway maintenance can have benefit-to-cost ratios ranging from 2.6:1 to 24:1 or higher.(January 2004)
In rural areas, communication networks that provide immediate access to remote data controls on field data can improve the efficiency and effectiveness of operations and maintenance activities.(5/1/2005)
In Montana, mainline weigh-in-motion scales can improve pavement fatigue estimates and save $4.1 million per year in construction costs.(11 August 2003)
In Washington DC an ITS work zone program implemented on I-295 decreased delay up to 90 percent with an average decrease in delay of 52 percent when drivers were advised to take alternate routes.(October 2008)
In Texas, during major incidents or high construction impact periods, the work zone traffic management system diverted an average of 10 percent of mainline traffic to alternate routes, with the highest diversion of traffic at 28 percent.(October 2008)
In Iowa, a CB radio alert system designed to warn truckers of slow moving maintenance vehicles on freeways effectively warned 39 of 59 truckers interviewed that remembered seeing the maintenance work in-progress.(May 2000)
In Kalamazoo Michigan, the activation of the Dynamic Lane Merge System in a work zone reduced the number of forced merges seven fold and reduced the number of dangerous merges three fold.(October 2008)
An automated work zone information system deployed on a California interstate greatly reduced traffic demand through the work zone resulting in a maximum average peak delay that was 50 percent lower than expected.(22-26 January 2006)
During lane closures in the Minneapolis/St. Paul region a dynamic late merge system reduced confusion and aggressive driving, decreased queue lengths, and reduced congestion.(28 December 2004)
A dynamic lane merge system deployed at a work zone outside Detroit reduced aggressive driving maneuvers.(October 2004)
A dynamic lane merge system deployed in a work zone outside Detroit increased PM peak travel speeds by 15 percent, no change in AM peak speeds.(October 2004)
A dynamic lane merge system deployed outside Detroit was found to be cost-effective based on an analysis of system cost and motorist time and fuel savings.(October 2004)
The Illinois DOT enhanced work zone safety on I-55 by deploying an automated traffic control system that posted traffic information and enforcement updates (number of citations issued) on dynamic message signs located upstream of the work zone.(October 2004)
The Illinois DOT staff reported a high level of satisfaction with the automated traffic control system deployed during the reconstruction of Interstate 55.(October 2004)
The Illinois DOT reduced operating costs during the reconstruction of I-55 by deploying an automated traffic control system and eliminating the need for constant traffic monitoring.(October 2004)
The Illinois DOT indicated that an automated traffic control system deployed during the reconstruction of I-55 improved mobility by preventing severe congestion in the work zone. (October 2004)
In Albuquerque, New Mexico, work zone surveillance and response at the "Big I" Interchange reduced average clearance time by 44 percent.(4-7 June 2001)
During the first year of operations at the "Big I" work zone in Albuquerque, temporary traffic management and motorist assistance patrols reduced the average incident response time to less than eight minutes, and no fatalities were reported.(4-7 June 2001)
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)
An evaluation of work zone safety technologies in Texas showed that speed display trailers can reduce average vehicle speeds by 5 mi/hr and decrease the number of vehicles traveling at excessive speeds in rural work zones. (2000)
In Nebraska, a portable speed detection and warning system placed upstream from an I-80 work zone decreased the highest 15 percent of vehicle speeds by about 5 mi/hr as vehicles approached the work zone lane merge area.(May 2000)
Speed-activated dynamic message signs with warning messages reduced vehicle speeds by 8 to 9 mi/hr; sustained effects for long-term work zones.(December 1998)
At a work zone in South Dakota, a speed monitoring and display system reduced the number of speeding passenger vehicles and trucks by as much as 25 and 40 percent respectively.(1995)
Speed-activated dynamic message signs with warning messages reduced speeding vehicles by 50 percent or more in Virginia work zones. (August 1994)
In North Carolina, a work zone equipped with smart work zone traveler information systems observed fewer crashes compared to other work zones without the technology.(May 2005)
In Albuquerque, New Mexico, work zone surveillance and response at the "Big I" Interchange reduced average clearance time by 44 percent.(4-7 June 2001)
During the first year of operations at the "Big I" work zone in Albuquerque, temporary traffic management and motorist assistance patrols reduced the average incident response time to less than eight minutes, and no fatalities were reported.(4-7 June 2001)
In Little Rock Arkansas, 82 percent of the drivers surveyed agreed that the Automated Work Zone Information System improved their ability to react to slow or stopped traffic.(October 2008)
An automated work zone information system deployed on a California interstate greatly reduced traffic demand through the work zone resulting in a maximum average peak delay that was 50 percent lower than expected.(22-26 January 2006)
In North Carolina, work zone construction staff observed a dramatic reduction in queue frequency and length when using a smart work zone traveler information system.(May 2005)
In North Carolina, a work zone equipped with smart work zone traveler information systems observed fewer crashes compared to other work zones without the technology.(May 2005)
An automated work zone information system deployed near Los Angeles, California, reduced freeway delay by 46 percent.(9-13 January 2005)
Modeling data indicated that an automated work zone information system deployed on I-5 near Los Angeles contributed to a 4.3 percent increase in diversions and an 81 percent increase in average network speed.(9-13 January 2005)
In North Carolina, a survey of motorists who experienced a smart work zone information system on I-95 found that 85 percent of respondents changed routes at least once in response to the delay and alternate route information posted.(9-13 January 2005)
An automated work zone information system deployed near Los Angeles effectively diverted traffic to alternate routes during periods of congestion.(2005)
In Los Angeles, a survey of motorists who experienced an automated work zone information system found that 78 percent of respondents changed their route based on the information provided.(2005)
The Illinois DOT enhanced work zone safety on I-55 by deploying an automated traffic control system that posted traffic information and enforcement updates (number of citations issued) on dynamic message signs located upstream of the work zone.(October 2004)
The Illinois DOT staff reported a high level of satisfaction with the automated traffic control system deployed during the reconstruction of Interstate 55.(October 2004)
The Illinois DOT reduced operating costs during the reconstruction of I-55 by deploying an automated traffic control system and eliminating the need for constant traffic monitoring.(October 2004)
The Illinois DOT indicated that an automated traffic control system deployed during the reconstruction of I-55 improved mobility by preventing severe congestion in the work zone. (October 2004)
In North Carolina, a survey of local residents near the Smart Work Zone systems found that over 95 percent of motorists surveyed would support use of these systems in the future.(September 2004)
In North Carolina, Smart Work Zone systems increased alternate route usage by 10 to 15 percent when specific delay and alternate route information was posted on roadside dynamic message signs.(September 2004)
In North Carolina, a modeling study indicated that work zone delay messages reduced maximum traffic backups by 56 percent and contributed to 55 percent reduction in traveler delay.(11-15 January 2004.)
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)
Ninety-seven (97) percent of the motoring public found that predicted travel time information was useful when posted at a work zone on I-75 near Dayton, Ohio. (January 2002)
A work zone management system with real-time traffic information on I-496 in Lansing, Michigan had a benefit-to-cost ratio of 2:1.(14 March 2001)
In Nebraska, a portable speed detection and warning system placed upstream from an I-80 work zone decreased the highest 15 percent of vehicle speeds by about 5 mi/hr as vehicles approached the work zone lane merge area.(May 2000)
In Greenwood, Nebraska a portable traffic management system designed to caution drivers of work zone activity and encourage use of alternative routes during periods of congestion increased traffic diversion by 4 percent.(May 2000)
In Greenwood, Nebraska a survey of travelers indicated that 29 percent of drivers who remembered DMS messages at a work zone on I-80 thought the alternate route information provided was not useful; 23 percent thought the caution messages were not useful.(May 2000)
Speed-activated dynamic message signs with warning messages reduced vehicle speeds by 8 to 9 mi/hr; sustained effects for long-term work zones.(December 1998)
In the Minneapolis/St. Paul, a motorist survey found 61% of drivers who experienced a portable traffic management system at a work zone felt more informed about traffic conditions than at other work zones.(May 1997)
In the Minneapolis/St. Paul, traffic speed data collected at two interstate work zones showed that when portable traffic management systems were deployed, work zone traffic volumes increased 4 to 7 percent during peak periods.(May 1997)
In the Minneapolis/St. Paul, a portable traffic management system installed at two interstate work zones improved safety by slowing approaching vehicles by 9 mi/hr and reducing speed variability by 70 percent. (May 1997)
In Minnesota, a survey of travelers indicated that Smart Work Zone warning signs were accurate, useful, and gave travelers the information they needed.(January 1997)
In Philadelphia, the Traffic and Incident Management System (TIMS) on I-95 contributed to a 40 percent decrease in freeway incidents and reduced the incident-severity rate by 8 percent.(January 1997)
At a work zone in South Dakota, a speed monitoring and display system reduced the number of speeding passenger vehicles and trucks by as much as 25 and 40 percent respectively.(1995)
Speed-activated dynamic message signs with warning messages reduced speeding vehicles by 50 percent or more in Virginia work zones. (August 1994)
A variable speed limit system deployed at a work zone on I-96 in Lansing, Michigan contributed to a decrease in the number of high-speed vehicles in the work zone.(September 2003)
A variable speed limit system deployed at a work zone on I-96 in Lansing, Michigan contributed to a decrease in travel times and an increase in average speeds.(September 2003)
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)
In North Carolina, a survey of local residents near the Smart Work Zone systems found that over 95 percent of motorists surveyed would support use of these systems in the future.(September 2004)
An I-40 work zone in Arkansas equipped with an automated work zone information system had fewer fatal crashes compared to similar sites without the technology.(12-16 January 2003)
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)
An automated work zone information system deployed on a California interstate greatly reduced traffic demand through the work zone resulting in a maximum average peak delay that was 50 percent lower than expected.(22-26 January 2006)
An evaluation of the Arizona 511 telephone traveler information system found that more than 70 percent of users surveyed were satisfied with the enhanced content provided.(30 September 2005)
In North Carolina, a work zone equipped with smart work zone traveler information systems observed fewer crashes compared to other work zones without the technology.(May 2005)
The Illinois DOT enhanced work zone safety on I-55 by deploying an automated traffic control system that posted traffic information and enforcement updates (number of citations issued) on dynamic message signs located upstream of the work zone.(October 2004)
The Illinois DOT indicated that an automated traffic control system deployed during the reconstruction of I-55 improved mobility by preventing severe congestion in the work zone. (October 2004)
In North Carolina, a survey of local residents near the Smart Work Zone systems found that over 95 percent of motorists surveyed would support use of these systems in the future.(September 2004)
In North Carolina, a modeling study indicated that work zone delay messages reduced maximum traffic backups by 56 percent and contributed to 55 percent reduction in traveler delay.(11-15 January 2004.)
In Albuquerque, New Mexico, work zone surveillance and response at the "Big I" Interchange reduced average clearance time by 44 percent.(4-7 June 2001)
During the first year of operations at the "Big I" work zone in Albuquerque, temporary traffic management and motorist assistance patrols reduced the average incident response time to less than eight minutes, and no fatalities were reported.(4-7 June 2001)
In the Minneapolis/St. Paul, traffic speed data collected at two interstate work zones showed that when portable traffic management systems were deployed, work zone traffic volumes increased 4 to 7 percent during peak periods.(May 1997)
In the Minneapolis/St. Paul, a portable traffic management system installed at two interstate work zones improved safety by slowing approaching vehicles by 9 mi/hr and reducing speed variability by 70 percent. (May 1997)
An automated work zone information system deployed on a California interstate greatly reduced traffic demand through the work zone resulting in a maximum average peak delay that was 50 percent lower than expected.(22-26 January 2006)
In North Carolina, work zone construction staff observed a dramatic reduction in queue frequency and length when using a smart work zone traveler information system.(May 2005)
In North Carolina, a work zone equipped with smart work zone traveler information systems observed fewer crashes compared to other work zones without the technology.(May 2005)
An automated work zone information system deployed near Los Angeles, California, reduced freeway delay by 46 percent.(9-13 January 2005)
Modeling data indicated that an automated work zone information system deployed on I-5 near Los Angeles contributed to a 4.3 percent increase in diversions and an 81 percent increase in average network speed.(9-13 January 2005)
In North Carolina, a survey of motorists who experienced a smart work zone information system on I-95 found that 85 percent of respondents changed routes at least once in response to the delay and alternate route information posted.(9-13 January 2005)
An automated work zone information system deployed near Los Angeles effectively diverted traffic to alternate routes during periods of congestion.(2005)
In Los Angeles, a survey of motorists who experienced an automated work zone information system found that 78 percent of respondents changed their route based on the information provided.(2005)
During lane closures in the Minneapolis/St. Paul region a dynamic late merge system reduced confusion and aggressive driving, decreased queue lengths, and reduced congestion.(28 December 2004)
A dynamic lane merge system deployed at a work zone outside Detroit reduced aggressive driving maneuvers.(October 2004)
A dynamic lane merge system deployed in a work zone outside Detroit increased PM peak travel speeds by 15 percent, no change in AM peak speeds.(October 2004)
A dynamic lane merge system deployed outside Detroit was found to be cost-effective based on an analysis of system cost and motorist time and fuel savings.(October 2004)
The Illinois DOT enhanced work zone safety on I-55 by deploying an automated traffic control system that posted traffic information and enforcement updates (number of citations issued) on dynamic message signs located upstream of the work zone.(October 2004)
The Illinois DOT staff reported a high level of satisfaction with the automated traffic control system deployed during the reconstruction of Interstate 55.(October 2004)
The Illinois DOT reduced operating costs during the reconstruction of I-55 by deploying an automated traffic control system and eliminating the need for constant traffic monitoring.(October 2004)
The Illinois DOT indicated that an automated traffic control system deployed during the reconstruction of I-55 improved mobility by preventing severe congestion in the work zone. (October 2004)
In North Carolina, Smart Work Zone systems increased alternate route usage by 10 to 15 percent when specific delay and alternate route information was posted on roadside dynamic message signs.(September 2004)
In North Carolina, a modeling study indicated that work zone delay messages reduced maximum traffic backups by 56 percent and contributed to 55 percent reduction in traveler delay.(11-15 January 2004.)
An I-40 work zone in Arkansas equipped with an automated work zone information system had fewer fatal crashes compared to similar sites without the technology.(12-16 January 2003)
Ninety-seven (97) percent of the motoring public found that predicted travel time information was useful when posted at a work zone on I-75 near Dayton, Ohio. (January 2002)
In Albuquerque, New Mexico, work zone surveillance and response at the "Big I" Interchange reduced average clearance time by 44 percent.(4-7 June 2001)
During the first year of operations at the "Big I" work zone in Albuquerque, temporary traffic management and motorist assistance patrols reduced the average incident response time to less than eight minutes, and no fatalities were reported.(4-7 June 2001)
In the Minneapolis/St. Paul, a motorist survey found 61% of drivers who experienced a portable traffic management system at a work zone felt more informed about traffic conditions than at other work zones.(May 1997)
In the Minneapolis/St. Paul, traffic speed data collected at two interstate work zones showed that when portable traffic management systems were deployed, work zone traffic volumes increased 4 to 7 percent during peak periods.(May 1997)
In the Minneapolis/St. Paul, a portable traffic management system installed at two interstate work zones improved safety by slowing approaching vehicles by 9 mi/hr and reducing speed variability by 70 percent. (May 1997)
