Highway Travel March 2nd, 2009 Goto comments Leave a comment 1. interstate highway 2. exit ramp 3. overpass 4. cloverleaf 5. left lane 6. center lane 7. right lane 8. speed limit sign 9. hitchhiker 10. trailer 11. service area 12. attendant 13. air pump 14. gas pump 15. passenger car 16. camper 17. sports car 18. center divider 19. motorcycle 20. bus 21. entrance ramp 22. shoulder 23. road sign 24. exit sign 25. truck . Highway Travel March 2nd, 2009 Goto comments Leave a comment 1. interstate highway 2.