Glossary terms

Temporary Shoulder Use
An ATM measure consisting of opening a shoulder to traffic on a temporary basis to address capacity bottlenecks on the freeway network during times of congestion and reduced travel speeds. Also known as Dynamic Lane Use Control.
Traffic Management Center
A surveillance and control center for the road network in the area.
Traffic Volume
The amount of vehicles crossing a section of a road in a hour time.
Travel Time
The length of time it takes to travel between two points.
Travel Time Reliability (TTR)
A term referring to the variability in travel time that can be expected using different facilities.