C2−1: Traffic Impact Report (TIR)
On the majority of projects, the Traffic Impact Report (TIR) is used to identify construction impacts on traffic. It contains recommendations for traffic mitigation to be used by the designer of the traffic control plan (TCP). The decision to develop a TIR is a mutually reached decision of the Project Manager, Design Coordinator, and the Regional Traffic Operations Manager (within Transportation Systems Management) This practice was initiated in 1994, and is now part of the New Jersey Roadway Design Manual. The New Jersey Department of Transportation Engineering web page contains policy, procedures, manuals & guidelines, CADD drawings, and specifications involved in design (http://www.state.nj.us/transportation/eng/).
REASON(S) FOR ADOPTING:
To help with coordinating the required mitigation and timing of the project with other construction projects, both local government and private. Concurrent projects in close proximity had caused conflicting detours and overlapping traffic impacts.
The designer has the benefit of the TIR which recommends mitigation such as night work, restricted hours, number of lanes available for traffic, staging requirements, public information program, and transportation strategies (park and ride, shuttle buses, etc.). The designer uses the TIR in the preparation of the TCPs and staging plans. This approach has proven to result in a better overall TCP and reduction of the inconvenience of the motorist.
MOST APPLICABLE LOCATION(S)/PROJECT(S):
This practice is applicable to all facility types where significant impacts to traffic are expected due to construction activities.
STATE(S) WHERE USED:
Dhanesh (Dennis) Motiani, Executive Director, Transportation Systems Mgt., New Jersey DOT
Phone: (609) 530−4690