# Horizontal Curve Safety

## Quiz Questions

 1. The centerline pavement marking is the ________ treatment to apply to a curve section, assuming the road is paved and has sufficient width and volume. Maximum Minimum 2. The most common standard width for each stripe of a centerline stripe is: One inch Two inch Three inch Four inch 3. A New York study found that standard edge lines on curvy two-lane roads reduced total crashes by: 3% 5% 10% 15% 4. Not all horizontal curves require a Horizontal Alignment sign. True False 5. Traffic signs of all types use _____________ sheeting to ensure they are visible to drivers at night or in periods of low light. Retroreflective Reflective Magnetic None of the above 6. A 1968 evaluation of curve warning signs reported that installing warning signs can reduce crashes by: 5% 10% 18% 25% 7. The One-Direction Large Arrow sign is used to define a change in what alignment? Horizontal Vertical 8. Spacing should allow the motorist to view at least _____ signs until the change in alignment eliminates the need for the signs. One Two Three Five 9. The picture above is: Post delineators installed on a ramp Vertical Signs Two way signs None of the above 10. "Doubling-up" simply refers to situations where agencies install a second, identical sign on the _________ side of the roadway Left Right 11. One factor limiting the use of flashing beacons is the availability of an accessible power source True False 12. Space reflective sheeting panels 18 to 36 in apart, running ____________ to traffic. Parallel Perpendicular 13. A rumble strip can be formed in the pavement surface by placing either grooves into the surface or strips of material ____________ the surface according to a prescribed spacing pattern. Below Above 14. The installation cost depends on the: Length of section Pavement type and pattern Highway location All of the above 15. The vertical height difference between the paved surface and the unpaved shoulder is the pavement shoulder drop-off. Drop-offs happen when the unstabilized pavement edges ___________ , which creates the height difference. Are collided Erode Are not aesthetically pleasant None of the above