Traffic Control Devices Flashcards
(19 cards)
Percentage of driver guidance information may be received visually
Up to 90%
Minimum length of the mast arm for high-mast lighting, as used to light large highway areas such as interchanges and rest areas.
125 ft
According to MUTCD, no-passing zones shall be established at following locations:
At vertical and horizontal curves
Four sections of the PEDSAFE system:
Background information
List of countermeasures
Case studies
Selection tool
Message on a changeable message sign should be designed to be legible from a minimum distance for night time condition.
600 ft
Temporary pavement markings should not remain in place for more than
2 weeks
What is the philosophy of “Get in, Get Out and Stay out”?
Minimize disruption of normal traffic conditions
What is the minimum lateral offset from the edge of the traveled way for post-mounted signs?
12 ft
How many warrants does the MUTCD specify for the installation of traffic signals?
9
Minimum and maximum yellow change intervals
3 and 6 seconds
Centerline markings are required at all urban arterials and collectors that
Have traveled way of 20 or more in width
ADT of 6,000 vehicles per day or greater
Which traffic control device is typically used to prevent vehicular queueing across tracks at a crossing?
Queue cutter signal
What type of material provides retro reflectivity to pavement markings?
Glass beads
How many speed limits should be displayed on any one speed limit sign or assembly?
No more than 3 speed limits
How many destination names or street names should be displayed on any advance guide sign or exit direction sign?
No more than two
Minimum distance between an advance route turn assembly and either a destination sign or junction assembly in rural areas?
200 ft
What does the term “legend” include on traffic signs?
All word messages, symbols and arrow designs
In what situation may a hairpin curve sign be used instead of a curve or turn sign?
If curve has a change in horizontal alignment of 135 degrees or more
Which of the following meets the vertical clearance criterion for a warning beacon suspended over the roadway?
17 ft
