< Ohio
Ohio follows the general guidelines for road types and road names of the USA.
It is served by eight primary (I-70, I-71, I-74, I-75, I-76, I-77, I-80 and I-90) and fifteen auxiliary Interstate highways, as well as numerous US, state, county and township routes. The longest numbered highway in Ohio is SR-7, followed by US-62, US-20, SR-3 and I-71. The only toll road in Ohio is the Ohio Turnpike, which follows portions of I-90, I-80 and I-76 from Indiana to Pennsylvania. Ohio is the only US state that has numbered township routes in Waze. See the highway names table for further guidance on the naming of numbered highways in Ohio.