 The Iowa DOT operates 37 rest areas and one scenic overlook in 20 locations along its 780 miles ( 1 @,@ 260 km ) of interstate highway . Along I @-@ 80 , there are nine locations that have facilities for each direction of traffic . Parking areas are divided so passenger automobiles are separated from large trucks . Common among all of the rest stops are separate men 's and women 's restrooms , payphones with <unk> capabilities , weather reporting kiosks , vending machines , and free wireless Internet . Many stations have family restrooms and dump stations for recreational vehicles . 
