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 - correct answer - when not in use, where should a
PCMS be?
portable changeable message sign
1/2 mile visibility day and night - correct answer - how far should a PCMS be
visible?
Portable changeable message sign
*M*anual for
*A*ssessing
*S*afety
*H*ardware
MASH - correct answer - NCHRP 350 rewritten by AASHTO and is now an AASHTO
document called what?
, Page|2
Temporary Traffic Barriers - correct 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*
20:1 - correct answer - Typical Flare Rates for Barrier Rail - 70 MPH
18:1 - correct answer - Typical Flare Rates for Barrier Rail - 60 MPH
speed, traffic volume / composition, road classification, deflection space, roadway
alignment, sight distance, other factors. - correct answer - Barrier selection
guidelines based on
Barrier deflection - correct answer - the distance a barrier will displace when
struck