Illinois Permit Test: Speed Limits Practice Questions

Correct answer: 70 mph

Default limits: interstates and tollways 70, four-lane highways 65, other highways 55, city areas 30, alleys 15.

Source: Chapter 4: Traffic Laws – Speed Limits

Correct answer: 65 mph

Unless posted otherwise, four-lane highways have a 65 mph limit.

Source: Chapter 4: Traffic Laws – Speed Limits

Correct answer: 30 mph

City and town areas default to 30 mph unless otherwise posted.

Source: Chapter 4: Traffic Laws – Speed Limits

Correct answer: 15 mph

Alleys have a default limit of 15 mph.

Source: Chapter 4: Traffic Laws – Speed Limits

Correct answer: 55 mph

Other highways and rural areas default to 55 mph.

Source: Chapter 4: Traffic Laws – Speed Limits

Correct answer: School days, 6:30 a.m.–4 p.m., when children are present and signs are posted

School zones are 20 mph on school days between 6:30 a.m. and 4 p.m. when children are present and signs are posted.

Source: Chapter 4: Traffic Laws – Speed Limits

Correct answer: 24 hours a day, 7 days a week

Construction zone limits apply 24/7 regardless of whether workers are present; the limit may be lowered further when workers are present.

Source: Chapter 4: Traffic Laws – Construction Zones, Emergency Vehicles, School Zones and Funeral Processions

Correct answer: It quadruples

Doubling your speed quadruples your vehicle's stopping distance.

Source: Chapter 11: Safe Driving Tips – Vehicle Speed

Correct answer: Yes, unless necessary for safety

Driving slower than the minimum speed limit is illegal unless necessary for safety.

Source: Chapter 4: Traffic Laws – Speed Limits