Possible Clues:

• Toll rd
• Hwy. with tolls
• Toll rd.
• I-90 in Mass., e.g.
• I-90 in Mass., say
• Rd. often named for a state
• Highlighted rte. on a map
• Something that takes its toll?: Abbr.
• Texas's Pres. George Bush, e.g.
• N.J. or Pa. route