Revisions to Chapter 2C – Warning Signs and Object Markers

1. Revisions to Chapter 2C – Warning Signs and Object Markers

2. Some word message signs are deleted Also – STOP AHEAD, YIELD AHEAD, SIGNAL AHEAD

3. Fluorescent yellow-green color Required for school and school bus signs Optional for pedestrian, bike, and playground signs

4. 36” x 36” minimum size formulti-lane conventional roads

5. Guidelines for advance placement of warning signs – Table 2C-4 • Change to 20/40 visual acuity • Assumption of legibility distance of 180 feet for Condition A (speed reduction and lane change) • Assumption of minimum legend size of 6” lettering; if less, add 100 feet • Assumption of legibility distance of 250 feet for Condition B (stop and deceleration)

6. Application of horizontal alignment signs based uponcurve differential speed

7. New criteria for the determination of advisory speeds Support: Among the established engineering practices that are appropriate for the determination of the recommended advisory speed for a horizontal curve are the following: • An accelerometer that provides a direct determination of side friction factors • A design speed equation • A traditional ball-bank indicator using the following criteria: 16 degrees of ball-bank for speeds of 20 mph or less 14 degrees of ball-bank for speeds of 25 to 30 mph 12 degrees of ball-bank for speeds of 35 mph and higher

8. New variations of combination horizontal alignment-intersection warning signs

9. Chevron signs may be mounted at 4-foot height

10. New table for recommended spacing of Chevron signs

11. New table for spacing of Chevron signs

12. Advisory Curve Speed sign is deleted

13. New combination horizontal alignment/advisory exit or ramp speed signs

14. New Freeway Ends and Expressway Ends signs

15. New sign for use where a freeway or expressway ends and drivers must leave the facility on an exit ramp

16. New shoulder signs and plaques

17. New Surface Condition signs

18. New signs and plaque to warn of conditions that primarily affect motorcyclists

19. No Center Line sign

20. New warning signs for adverse weather conditions

21. New warning signs for road flooding

22. New warning signs for ramp metering

23. Speed limit reductions of more than 10 mph Reduced Speed Limit Ahead (W3-5) sign recommended

24. New Drawbridge sign

25. No Merge Area plaque

26. Freeway lane drop advance warning

27. New Roundabout plaque for circular intersection warning

28. Offset side roads and double side roads

29. New sign and plaque for combined pedestrian/bicycle crossing

30. New symbol signs to warn of possible presence oflarge animals

31. New sign to warn of a traffic pattern revision

32. Order of names and use of arrows when two street names appear on an advance street name plaque

33. Plaques for use when STOP signs control all but one approach to the intersection

34. Share the Road plaque cannot be used alone; can ONLY be used to supplement another sign

35. “New” plaque for mounting above a regulatory or advance warning sign to warn road users about a new regulation or condition

36. Object markers have been relocated from Part 3

37. Object Markers for Approach Ends of Guardrails • Where Type 3 object markers are applied to the approach ends of guardrail and other roadside appurtenances, sheeting without a substrate shall be directly affixed to the approach end of the guardrail in a rectangular shape conforming to the size of the approach end of the guardrail, with alternating black and retroreflective yellow stripes sloping downward at a angle of 45 degrees toward the side of the obstruction on which traffic is to pass.