AIRPORTDES PRELIM
Closely spaced and irregularly spaced intersections could lead to potential induced friction in the flow of traffic due to frequent turn movements
TRUE
Signalized intersections are more common than unsignalized intersections.
FALSE
Preservation of transportation infrastructure investment is one benefit of implementing appropriate access management policies in the community.
TRUE
Providing access openings within the functional area could lead to decrease the number of conflict points and the crash rates.
FALSE
Driveway spacing is increasing the distance between traffic signals which improves the flow of traffic on major arterials, reduces congestion, and improves air quality for heavily traveled corridors.
FALSE
Access design and location recognize that access control elements, just like traditional geometric elements, must progress in a logical manner that leads to improved travel capacity, safety, and maintenance of travel speeds.
TRUE
Large and regular signal spacing inclines to provide efficient traffic progression on major urban arterials
TRUE
Access Management is the proactive management of vehicular access points to land parcels adjacent to all manner of roadways.
TRUE
Access Management should address the following areas except:
LOCAL STREETS
While full median openings are recommended at all signalized intersections; the _____ are emerging as safer and more efficient at unsignalized intersections between signals.
DIRECTIONAL MEDIAN OPENINGS
These are 3 major benefits in implementing access management except...
LONGER VEHICLE LIFESPAN
The increase in the number of access points along a roadway corridor introduces additional conflict points, causing friction in traffic flow, higher potential of traffic crashes, and additional congestion and delay.
ACCESS SPACING
It is the distance required by the driver to clear the intersection, and be able to perceive and react to a conflict downstream of the intersection.
DOWNSTREAM FUNCTIONAL AREA
They carry high volumes of traffic and provide long distance, high speed travel.
MAJOR ARTERIALS
It is defined as the distance between two successive at-grade signalized intersections, measured between the closer curb/edge of the intersection.
SIGNAL SPACING
Lateral displacement is usually in the range of 6 to 8 feet when impacted by a full-size pick-up truck. They can be anchored down to minimize deflection.
STEEL BARRIERS
These are defined as devices that contain and/or redirect vehicles and meet the crashworthiness evaluation criteria.
POSITIVE PROTECTION DEVICES
Which should you use in this scenario: Does not involve moving operation, 2 days duration, Removal and installation is not a big factor, Has isolated work crews.
SHADOW VEHICLES WITH TRUCK OR TRAILER MOUNTED ATTENUATORS
TMA
Which should you use in this scenario: Project involves moving operation, with enough roll ahead distance
SHADOW VEHICLES WITH TRUCK OR TRAILER MOUNTED ATTENUATORS
TMA
Used in longer term, mobile, short duration, and short-term stationary work zones where other types of barriers may not be feasible due to the time needed for installation and removal and due to the length of the area being protected.
SHADOW VEHICLES WITH TRUCK OR TRAILER MOUNTED ATTENUATORS
TMA
Which should you use in this scenario: Does not involve moving operation, 48 hour duration, Removal and installation is not a big factor, Has no isolated work crews, Project is in a low speed area with narrow lanes.
WATER FILLED BARRIERS
Which should you use in this scenario: Does not involve moving operation, 36 hour duration, Removal and installation is not a big factor, Has no isolated work crews, Project is in a lowspeed area.
WATER FILLED BARRIERS
Which should you use in this scenario: Project does not involve moving operation, Project duration is 5 days, The buffer space is long enough.
VEHICLE ARRESTING SYSTEMS
Which factor is being described? Performing work during off-peak periods may reduce exposure compared with higher traffic levels during peak periods. Even with reduced exposure to higher traffic, consideration should be given to the time of day and potential impacts on visibility during nighttime work when determining the need for positive protection.
TIME OF DAY
Which factor is being described? Positive protection devices should be considered for all roadways when needed, but may be especially important for higher speed, higher mobility roadways such as freeways. For example, portable concrete barriers should be used to separate opposing traffic flows on a freeway crossover and the resulting shared mainline.
ROADWAY CLASSIFICATION
Which factor is being described? Workers are at increased risk when traffic speeds are higher. Agencies may define high speed versus low speed, but generally 45 mph or greater is considered a high-speed facility. Consideration should be given to the average speed or the 85th percentile speed in addition to the posted speed limit when determining operating speed.
ANTICIPATED TRAFFIC SPEEDS THROUGH THE WORK ZONE
Typically used where large barrier deflections are less likely due to the lower traffic speeds or low impact angles.
BALLAST FILLED BARRIERS
Which factor is being described? Projects on roadways with a high percentage of truck and heavy vehicle traffic may benefit from positive protection due to the greater impact potential of a heavy vehicle intrusion into a work space.
VEHICLE MIX