Capital Improvement Program

What speeds are coded on the database?

Posted speeds on major highways are available from the region’s travel demand modeling network. Congested speeds for major roadways (functional classes “collector” and above) typically come from the region’s travel time database that is created and maintained by the MPO. Average AM and PM peak hour speeds are available from travel time surveys. Speeds on other roadways, for example local streets, are typically estimated based on presumed speed limits (for example, 15 mph or 20 mph).

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