Skip to main content

Possible online services disruption due to Internet related outage

A worldwide technology outage is causing disruption to some State of Illinois online systems.  We are aware of this issue and are diligently working on restoration.

Agency Alert

Welcome to the new IDOT home page.  Our location has changed, please update any bookmarks.

Studies and Plans

Once funding has been secured and the LPA has determined if the engineering activities will be performed with in-house staff or by a consultant, engineering work may begin. 

Preliminary engineering is divided into the following phases:

Phase I

All projects funded through IDOT must meet applicable federal and state laws and regulations requiring identification and evaluation of the project’s environmental impacts.

The following chapters of the Bureau of Local Roads and Streets Manual include environmental documentation, coordination, and general NEPA compliance procedures.

Phase II