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Planning Guidance for the Installation and Use of Technology Devices for Transportation Operations and Maintenance

ENTERPRISE Transportation Pooled Fund Study

CCTV Guideline 2 - Traffic Incident or Event Verification

Purpose: To allow traffic operations personnel or emergency response teams to visually verify traffic flow and/or incidents (e.g. crashes, debris in roadway) in order to activate or dispatch appropriate response and post message to traveler information systems.

Engineering judgment should be used to assess potential implications that may result from the installation of CCTV. This planning guidance does not mandate the use of CCTV.

1. The candidate location encounters incidents as frequently as twice per month for arterial streets or once per month for freeways.

AND

2a. The incidents and events that occur on freeways typically cause delay to travelers of at least 15 minutes while the incident is active and has not been cleared.

OR

2b. The incidents and events that occur on arterials typically cause impact travel such that the signal progression is no longer occurring and vehicles are not clearing green cycles.

OR

2c. Incident location verification is needed by 911 dispatchers (e.g. large complex interchange where drivers don't know where they are, closely spaced interchanges).

AND

3. The location encounters:

• At least 2 hours per day of peak period travel where traffic flow exceeds 1,100 veh/hr/lane; or
• Conditions considered Level of Service C; or
• Average annual daily traffic (AADT) of 16,800 for a 2 lane road; 33,600 for a 4 lane road; 50,400 for a 6 lane road; 67,200 for an 8 lane road.