Transportation, Department of
Transportation, Department of
Our mission is to provide safe, cost-effective transportation for Illinois’ residents and visitors in ways that enhance quality of life, promote economic prosperity and demonstrate respect for the environment.

Bicycling in Illinois
Illinois seeks to develop bicycle policies that promote safe, sustainable and fiscally responsible bicycling in Illinois.
Agregate Material Approval
Various tests, including quality, freeze-thaw and alkali-silica reactivity (ASR) are performed on aggregates used for road and bridge construction in Illinois. These tests quantify the physical characteristics of each aggregate product from each source. Development and evaluation of all statewide aggregate related policies, procedures and specifications are continually modified to keep them current with new technologies and test procedures. Provides information regarding the process and how to get materials approved.
Cement Material Approval
Focus areas include testing, acceptance and approval of portland and blended cement, other special cements, ground granulated blast furnace slag (GGBF), microsilica (silica fume), high reactivity metakaolin, fly ash, and other miscellaneous cement products. Other focus areas include research studies regarding cement and finely divided mineral applications, and methods for improving cement and finely divided mineral quality throughout the state.
Concrete Material Approval
Focus areas are testing, acceptance and approval of products such as admixtures, curing compounds, pre-packaged concrete products, freeze-thaw durable aggregates, and other miscellaneous products related to concrete. Provides information regarding the process and how to get materials approved. -acquisition-procurements
Land Acquisition Procurements
Extensive land acquisition activity is often required to complete IDOT's Multi-Year Multi-Modal Transportation Improvement Program. To accomplish the program without appreciably increasing the number of IDOT personnel or performing services for which the department does not have specialized expertise, the department utilizes outside vendors.
Metals Material Approval
Contractual metals and miscellaneous materials used in the State’s highway construction and maintenance programs are required by both the Federal Highway Administration and the State of Illinois Departmental Policy. In addition to materials testing the Department has several certification/qualification/approval programs requiring field inspection either at the manufacturing location or the job site.
Rest Area Agreements
Provides forms for vendors wishing to distribute newspapers or free travel publications to the traveling public at Illinois highway rest areas.
Outdoor Advertising Permits
This section outlines the process by which to legally Advertise Adjacent to Primary and Interstate Highways.
Register for Traffic Alerts
A free service that provides email notifications of up to date traffic information on user-selected trips along the expressways in the Travel Midwest coverage area.
School Bus Inspections
Provides information on regulating and overseeing both scheduled and non-scheduled school bus inspections.
Special Sign Permits
Provides information on special sign programs that provide motorists with business identification and directional information for eligible motorist services, attractions, and tourist-oriented businesses.
Airport & Heliport Certification
IDOT is empowered and directed to encourage, foster and assist in the development of aeronautics in this state and to encourage the establishment of airports and other air navigation facilities. The Division of Aeronautics classifies and approves airports and restricted landing areas and any alterations or extensions thereof.
Doing Business with Illinois Dept. Transportation
IDOT continually advertises its need for professional services, construction and specialized material needs through its "Doing Business with IDOT" site.
Aircraft Registration
State law requires aircraft owners who reside in Illinois and fly their aircraft in the state to register their aircraft with IDOT.
Pilot Registration
Pilots who reside in Illinois are required to register their federal certificate with the state.
Construction Procurements
In order to perform construction work for IDOT, contractors must first seek prequalification in specialized categories. Once prequalified, a firm is eligible to submit a bid on state and local advertised projects. If awarded the contract, the firm follows department rules and regulations until fulfillment of the contractual obligation.
Illinois Roads Interactive Map
Web-based interactive mapping site that provides the ability to search and display several sources of transportation data. You can find information on winter road conditions, annual average daily traffic, road construction, trucking routes, and planned road projects.
Gateway Traveler Information System Interactive Map
Weather, construction, road closure maps
Illinois Rest Areas
Rest area related information such as services available, location information, location and rest area name.
Illinois Bridge Information Search
Offers offer bridge inspection and inventory information to the public.