ATSSA Traffic Control Supervisor Re certification Test Exam Questions And Answers Verified 100% Correct

ATSSA Traffic Control Supervisor Re certification Test Exam Questions And Answers Verified 100% Correct 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 portable concrete barriers - ANSWER -less expensive for long-term projects, easy to maintain, reusable, low deflection. Heavy equipment needed for installation. concrete, water-filled, anchored, move-able, mobile, steel - ANSWER types of temporary traffic barriers Light in color and supplemented with standard delineation or pavement markings - ANSWER -If Temporary Traffic Barriers are used as channelizing devices they should be: Appropriately flared or protected with properly installed crash cushions - ANSWER -The blunt end of a barrier is a hazard. *ALL* upstream leading ends shall be: 20:1 - ANSWER -Typical Flare Rates for Barrier Rail - 70 MPH 18:1 - ANSWER -Typical Flare Rates for Barrier Rail - 60 MPH Decrease by 2:1 per 5 MPH stopping at 30 MPH with 8:1 - ANSWER -Below 60 MPH Barrier Flare Rates Decrease by The exposed end is outside the clear zone - ANSWER -Extend Barrier Rail Flare until The edge of the *TRAVELED* lane Typically 30' for High-speed facilities - ANSWER -Clear Zone is measured from, and is how far Uses for portable changeable message sign PCMS - ANSWER -speed drops significant delays adverse conditions advance notice of closures advance notice of road changes reinforce static signage updated guidance information placed 500'-800' ahead of workzone conflicts or 1.5-2 miles ahead of complex traffic control uses of screens (mounted on top of rail) - ANSWER -limit distractions