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In an effort to relieve highway congestion and promote the movement of people, some state departments of transportation have modified their freeway facilities to include high occupancy vehicle lanes, high occupancy toll lanes (HOT, or HO lanes), and other managed lane strategies.
NCHRP Web-Only Document 387: Safety Prediction Model for Freeway Facilities with High Occupancy Lanes, from TRB's National Cooperative Highway Research Program, fulfills an analytical gap, providing a safety prediction methodology specifically for freeway facilities with HO lanes and provides a stand-alone approach by using one-direction models for freeway segments, entrance speed-change lanes, and exit speed-change lanes.
Supplemental to the report are Appendices A and B, an Analysis Tool, an Informational Guide, a Safety Implementation Guide, and a Safety Prediction Model Presentation.
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