In the United States, approximately 60 to 80 percent of survey respondents approve of automated enforcement systems at traffic signals. (13 August 2001)
Automated enforcement at intersections in the United States reduced traffic signal violations by 20 to 87 percent.(13 August 2001)
A survey of drivers in Glasgow, Scotland, found that 40 percent changed route due to DMS recommendations.(January 2000)
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)
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)
Scotland