A 3-minute lesson from the Indiana course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.
Indiana requires you to obey posted speed limits. Speed reduces your ability to steer around curves and objects, lengthens stopping distance, and makes crashes more severe. Air bags and seat belts also work less well as speed rises.
Urban area
An area with a population of at least 50,000 people. Rural interstates are outside these areas.
Near a school, slow to the lower posted school zone limit. Common hours are 7 a.m. to 4:30 p.m., Monday through Friday, or whenever school speed beacons flash. Local authorities may set lower limits whenever children are present.
You're driving a car on a rural interstate with no other limit posted, so the maximum is 70 mph. When the interstate enters an urban area of 50,000+ people, the maximum drops to 55 mph unless posted otherwise.
Check your understanding
Read the question, decide on an answer, then open it to check the explanation. These are Roadwise study questions based on the source handbook.
Unless otherwise posted, what is the maximum speed for passenger vehicles on rural interstate highways?
65 mph
60 mph
75 mph
70 mph
Answer: 70 mph
Passenger vehicles may not exceed 70 mph or the posted speed limit on rural interstate highways.