A phase or type of work involving traffic studies needs analyses, corridor studies, and other work preparatory to project development. CD denotes NJDOT concept development; LCD denotes concept development by a local entity (MPO, county, municipality).

The purpose of concept development is to deliver projects to Feasibility Assessment with a well-defined need and a recommended concept that has been environmentally screened and has received community support. Concept development includes the following major elements:

* Early and intensive public involvement

* An evaluation of project need

* An analysis of physical deficiencies

* Environmental screening

* Evaluation of alternative strategies/fulfillment of CMS requirements

* Definition of potential concepts, limits and/or complimentary strategies as well as staging and phasing opportunities

* address community design/aesthetic opportunities

* Order of magnitude cost estimate

The concept development Process is divided into the following four phases:

1. Background Research and Work Program Development

2. Problem Identification and Project Need

3. Congestion Management Strategies and Fulfilling Congestion Management System (CMS) Requirements

4. Concept Development and Analysis