Illinois State Police

Agency Role
The Illinois State Police (ISP) is responsible for providing law enforcement services to Interstate 355 and Interstate 88. They patrol both interstates and respond to all calls on the tollway, and respond to higher priority calls if needed. The department is located at the 355 and 88 interchange, and has a light presence on the roadway.

Members
ISP is capped at 50 members. Members go through formal LEO training at the Illinois State Police Academy. They are sworn members who protect the tollway system.

Vehicle Fleet
The ISP fleet consists of the Ford Taurus, Explorer, and Expedition, as well as the Chevy Tahoe and Dodge Charger. ISP has a few CVPIs in storage.