When Is a Transportation Impact Analysis Required?

A full Transportation Impact Analysis is required for cases (in staff’s judgement) that:

1. Would be anticipated to generate more than 500 vehicle trip ends per day and/or more than 60 vehicle trip ends in the morning or evening peak hour and/or more than 100 vehicle trip ends during the peak hour of development traffic.  Developments anticipated to generate this amount of traffic (and thus require a Transportation Impact Analysis) include:
   1. 50 or more single-family residences,
   2. 80 or more multi-family residences,
   3. 75,000 square feet or more of industrial space,
   4. 40,000 square feet or more of office space,
   5. 10,000 square feet or more of retail space,
   6. any restaurant, convenience market, or gas station,
   7. any development with a drive-through.
2. Would be anticipated to generate more than 20 large truck trips per day
3. Propose a zone change that, in typical build-out scenarios, would be anticipated to generate more traffic than the previous zoning
4. Are adjacent to a roadway where there is question about its cross section, such as the need for turn lanes at intersections or a site driveway, need for adequate queuing space between intersections and/or driveways, need for pedestrian or bicycle facilities, or other issues.
5. Would result in significant non-residential traffic through a residential neighborhood.
6. Would be required to submit a traffic study by the County or State guidelines for impact on their roads.
7. There is any doubt that the existing or proposed transportation facilities in the vicinity of the proposed development are capable of accommodating the amount of traffic expected to be generated by the proposed development or that on-site facilities would adequately function without impacting public streets.
8. A traffic study is necessary to protect the public interest.