Alphabet Soup
The MUTCD provides the national standard for traffic control devices in the United States, ensuring consistency and safety on roads and highways.
What is the Manual on Uniform Traffic Control Devices?
Speed Limit
This 1980s comedy film features NBA legend Kareem Abdul-Jabbar as co-pilot Rudolph Murdock.
What is Airplane?
This is in charge of keeping a parked vehicle stationary and prevents it from rolling down a hill or moving.
What is a parking brake?
What is 55?
AASHTO publishes specifications, test protocols, and guidelines used in highway design and construction across the United States.
What is the American Association of State Highway and Transportation Officials?
Vehicular Traffic Warning Signs and Plaques (such as Truck Crossing and Bicycles)
What is yellow and diamond?
The Chicago Transit Authority's "L" trains provide direct access to these two airports.
What are O'Hare (ORD) and Midway (MDW)?
The average speed of vehicles traveling unimpeded on a section of roadway.
What is free-flow speed?
State Highway 130 between State Highway 45 in Austin, TX and Interstate 10 in Seguin, TX is the highest posted speed limit in the United States.
What is 85 MPH?
The HCM contains concepts, guidelines, and computational procedures for computing the capacity and quality of service of various highway facilities.
Highway Capacity Manual
Passing, Keep Right, and Slow Traffic Signs
What is white and rectangular?
Atlanta Hartsfield-Jackson has been the world's busiest airport by passenger traffic for many years. What was the world's second busiest airport by passenger traffic in 2024?
What is Dubai International Airport?
The fundamental diagram of traffic flow uses this type of speed.
What is space-mean speed?
This number is the maximum speed limit on Tennessee interstates.
What is 70 MPH?
A PCE assesses the impact of different vehicles on traffic flow, comparing their effect to a single passenger car.
Passenger Car Equivalent
What is blue and square?
Who needs planes to deliver cargo on the eastern third of the U.S. when you can use one of these two Class I freight railroad companies?
Either what is CSX or what is Norfolk Southern?
Comprising of springs, shock absorbers, and linkages, this connects the vehicle to its wheels, ensuring a smooth ride.
What is a suspension?
Need to call the US DOT? Well, you'll need to start your call with this area code.
What is 202?
AREMA publishes recommended practices, reference materials, plans, and specifications for the railway industry.
What is the American Railway Engineering and Maintenance-of-Way Association?
Hiking, picnics, and camping
What is brown and square?
This elevated people mover links JFK International Airport with NYC’s public transportation network at Jamaica and Howard Beach Stations.
What is the AirTrain?
The braking distance function is equal to Velocity2/(2*g(f + Grade)). What does f stand for?
What is the coefficient of friction?
The braking distance function is equal to Velocity2/(2*g(f + Grade)), with g being the acceleration due to gravity.
What is g = 32.2 ft/sec2