Unless otherwise indicated, the speed limit on residential roads and within urban areas is 30 mph. Urban freeways have a maximum speed of 65 mph, while primary undivided roads can have a speed limit of between 55-70 mph. On rural divided highways the speed limit can vary from 65 to 75 mph, while rural freeways, such as the I-95 that connects to Arizona, can range between 70-80 mph. Search rental cars on KAYAK