IntellidriveSM Dynamic Mobility Applications: Open Source Application Development Portal

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SPD-HARM: Key Deployments, cont.

United Kingdom’s M42: Speed Harmonization via VSL Signing

Implementation highlights:

•Utilizes enhanced message signs, hard shoulder running, and automated enforcement

•Posted speed limit algorithm based on flow thresholds and between-lane speed differentials

Findings:

•Undetermined

Minnesota’s I-35: Speed Harmonization via VSL Signing

Implementation highlights:

•Goal to manage deceleration and prevent rapid propagation of shockwaves

•Speed data from loops collected every 30 seconds

•Advisory (non-enforced) speed limits

Findings:

•Good compliance, without enforcement

•Currently being evaluated