Illinois speed control practice questions

Applies everywhere

Speed control rules that hold in every state

A sample of the national speed control bank. All 10 are in the practice run, combined with the Illinois items above for 12 questions in total.

1. 1. Higher speed increases crash severity mainly because:

   • AVehicles become heavier
   • The energy involved in a collision rises steeply with speed
   • CSeat belts loosen
   • DAir bags deploy later

   Answer: The energy involved in a collision rises steeply with speed. A crash at higher speed releases far more energy into the vehicles and occupants, so injuries are more severe.

   Source: Official state driver handbook — Speed management — crash risk

2. 2. The basic speed rule requires you to drive:

   • AAt the posted limit at all times
   • At a speed that is reasonable and prudent for the conditions
   • CAs fast as surrounding traffic
   • DAt the minimum posted speed

   Answer: At a speed that is reasonable and prudent for the conditions. Even below the posted limit you can be driving too fast if rain, fog, traffic, or road condition makes that speed unsafe.

   Source: Official state driver handbook — Speed management — basic speed rule

3. 3. A yellow sign showing a curve with a speed beneath it indicates:

   • AA legally enforceable minimum
   • An advisory safe speed for the curve in good conditions
   • CThe speed of oncoming traffic
   • DA weight restriction

   Answer: An advisory safe speed for the curve in good conditions. The advisory figure assumes dry pavement and good visibility. In rain, ice, or darkness a lower speed is needed.

   Source: Official state driver handbook — Speed management — advisory speeds