In school and residential zones, the speed limit will usually be 25 mph. For areas under construction, or particularly busy roads downtown, the speed limit is also 25 mph. On other roads within the city, you will often find a speed limit of 30 mph. When you drive on expressways in the city, the speed limit is generally 65 mph, while for interstates, it is typically 70 mph. Search rental cars on KAYAK