The real Illinois knowledge test is the DMV exam used for a learner permit. This page contains one fixed 20 question slice of the full free 180 question bank, with an explanation after each answer.
Sample question from test 9
signals-markings
Why are special lights sometimes displayed above individual highway lanes?
- To identify a lane reserved for parked vehicles
- To replace every other traffic control
- To show that the road has no speed limit
- To change the flow of traffic during certain hours
Answer: To change the flow of traffic during certain hours. Illinois uses special lights above lanes to change the flow of traffic during certain hours. Those signals help manage lane availability, but they do not replace speed limits, pavement markings, or other controls. A lane light is not a parking designation and does not erase every other rule. Before entering, read the display over your lane, follow its current indication, and continue watching for a later change in traffic flow.