FULL QUESTIONS AND CORRECT
ANSWERS
◉uses of screens (mounted on top of rail). Answer: limit distractions
and discourage rubbernecking
reduce headlight glare from oncoming traffic
reduce floodlight glare from night work
should not be mounted where they reduce motirist visibility and
sight distance
◉125' 245' 540' 660' 780'. Answer: Distance of L with 12' Lane
Width for:\
25, 35, 45, 55, 65 MPH
◉Moved outside the clear zone or be shielded by barrier or crash
cushion
placed on the shoulder or further from the traveled lane
delineated with retroreflective material in a continuous line.
Answer: when not in use, where should a PCMS be?
portable changeable message sign
, ◉1/2 mile visibility day and night. Answer: how far should a PCMS
be visible?
Portable changeable message sign
◉*M*anual for
*A*ssessing
*S*afety
*H*ardware
MASH. Answer: NCHRP 350 rewritten by AASHTO and is now an
AASHTO document called what?
◉Temporary Traffic Barriers. Answer: Portable devices designed to
prevent penetration by vehicles while minimizing injuries to vehicle
occupants.
Main function: PROTECTION
Secondary function: CHANNELIZATION
if not needed for protection then it *SHALL NOT BE USED*
◉speed, traffic volume / composition, road classification, deflection
space, roadway alignment, sight distance, other factors.. Answer:
Barrier selection guidelines based on
◉Barrier deflection. Answer: the distance a barrier will displace
when struck