Possible Clues:

• Toll rd
• Toll rd.
• I-90 in Mass., e.g.
• East-west Mass. artery
• NJ has a busy one
• Penn. crosser
• About 1/3 of Maine's I-95, e.g.
• Fwy.'s East Coast kin
• Toll rte.
• Highway with tolls: Abbr.