Question A driver must slow down in a school zone: Answers On school days between 6:30 a.m. and 4 p.m., when children are present, and where signs are posted. On weekends. Only during recess. Explanation Drivers must reduce their speed to 20 mph in a school zone on school days between 6:30 a.m. and 4 p.m., when children are present, and where signs are posted. Pass your DMV Written Test with flying colors Take me to the cheat sheet Illinois This questions appears in the following tests: Illinois Practice Test 1 Illinois Practice Test 24