Traffic Signs
This color on a traffic sign indicates regulatory instructions, such as speed limits.
What is white?
This Memphis bridge, one of the longest on the Mississippi River, connects Tennessee to Arkansas.
What is the Hernando de Soto Bridge?
A crest vertical curve must be designed to provide SSD based on this driver eye height (in feet).
What is 3.5 feet?
This TSMO strategy uses real-time data to adjust traffic signal timing based on current congestion.
What is adaptive signal control technology (ASCT)?
This 3 letter abbreviation is Memphis airport code.
What is MEM?
This type of sign provides directions to destinations like cities or exits.
What is a guide sign?
This interstate highway runs from Memphis to Bristol, spanning the entire length of Tennessee.
What is I-40?
This sight distance determines where dashed yellow lines begin on two-lane highways.
What is passing sight distance (PSD)?
(AASHTO requires PSD = 700–1,200 ft depending on speed.)
A TSMO plan must align with this federally required document for metropolitan areas.
What is the Metropolitan Transportation Plan (MTP)?
This lighting color is used for taxiway edge lights under MUTCD standards.
What is blue?
This sign shape is used exclusively for railroad corssings.
What is round (circular)?
What is 8? (22, 24, 26, 40, 55, 65, 75, 81)
The MUTCD requires this minimum sight distance for drivers approaching passive railroad crossings.
What is 15 seconds of travel time?
This technology allows vehicles to communicate with traffic signals to reduce delays.
What is Vehicle-to-Infrastructure (V2I) communication?
This three-letter code represents Nashville International Airport.
What is BNA?
On freeways, this minimum height (in feet) is required for ground-mounted guide signs unless clearance is restricted.
What is 7ft? (MUTCD Sect. 2A.18)
This Chattanooga attraction was once the world’s steepest passenger railway.
What is the Lookout Mountain Incline Railway?
In cities, SSD must account for this common obstacle blocking sightlines at intersections.
What are parked cars?
This traffic management tool uses signals at freeway on-ramps to control the flow of merging vehicles, reducing mainline congestion.
What is ramp metering?
At airports, double solid yellow lines on the pavement mark this critical boundary.
What is a runway holding position?
This font is the standard for highway guide signs under the MUTCD.
What is Clearview or Highway Gothic? (Sect. 2D.03)
Name this only US city where 3 primary interstates converge downtown.
What is Nashville? (24, 40, 65)
The MUTCD requires this minimum sight distance for drivers approaching a lane closure with a ‘Lane Ends’ sign.
What is 15 times the posted speed limit (in feet)?
(Example: 45 mph × 15 = 675 ft; MUTCD Sect. 6C.03)
This FHWA program funds projects that improve traffic flow, like ramp metering or incident management.
What is the Congestion Mitigation and Air Quality (CMAQ) Program?
Kentucky’s UPS Worldport sorts packages for delivery by this critical cutoff time.
What is 3:30 AM EST?