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Variable speed limit systems reduced the number and severity of crashes at three pilot sites in Texas. Benefit-to-Cost ratios ranged from 7:1 to 14:1.

FINDINGS The table below excerpted from the source report shows the potential B/C ratios. The benefits predicted in these deployments were based on a seven percent reduction in crashes estimated…
Content type
Date Posted
09/15/2017
Taxonomy (ARC-IT) Variable Speed Limits (TM20)

Variable speed limit system site selection should be rigorous and incorporate analysis of existing speed profiles and roadway ingress/egress characteristics to assure proper spacing of VSL systems and sensor inputs.

Primary lessons learned from the pilot tests included the following: Use permanent equipment preferably mounted over travel lanes. Temporary equipment was not suitable for long-term operations.…
Content type
Date Posted
09/15/2017
Taxonomy (ARC-IT) Variable Speed Limits (TM20)