In Illinois, temporary concrete barriers are used under following conditions: head-to-head traffic on interstates, interstate lane closures longer than two weeks, or two-lane roadways and bridges with … [Read more...] about Conditions for using temporary concrete barriers
Illinois
Flashing lights on speed limit signs
Illinois DOT uses flashing lights on speed limit signs. This is part of special provisions with penalties to contractors that fail to use. (However, penalties have not been enforced.) Speed limit is … [Read more...] about Flashing lights on speed limit signs
Individual responsible for the design of traffic control plans; Involvement of consultants and associated problems
Traffic control plans are designed by state/consultants and reviewed by District Traffic Control Supervisor. There have been problems with the involvement of consultants. … [Read more...] about Individual responsible for the design of traffic control plans; Involvement of consultants and associated problems
Type of sheeting specified on signs
In Illinois, fluorescent orange (diamond grade) sheeting is specified on freeway and selected project warning signs; stimsonite prismatic or high-intensity material is required on all other warning … [Read more...] about Type of sheeting specified on signs
Work zone implementation of intelligent transportation systems
Illinois uses video detection equipment for incident detection in a work zone to allow messages to change on changeable message signs as conditions warrant. Illinois is using Autoscope (a product by … [Read more...] about Work zone implementation of intelligent transportation systems
Time frame allowed for lane closure setup (e.g., 9:00am to 3:30pm)
Illinois defines closure and opening times for holiday weekend periods. When opening a roadway for a holiday weekend, all lanes must be open and unnecessary equipment removed from the lane and … [Read more...] about Time frame allowed for lane closure setup (e.g., 9:00am to 3:30pm)