Historical clue formulations

• Toll rds. — 2018-03-11
• Rtes. with plazas — 2009-05-16
• Some hwys. — 2000-09-17
• Some N.Y. and N.J. roads — 1999-01-30
• There's no free ride on these hwys. — 1998-09-22
• Some rtes. — 1997-11-30
• Toll rds. — 1994-12-18