Collect Data for Study
Traffic W.O.R.D.S.
Abbreviations in Transportation Planning
Transportation
Alphabet Soup
Starts with F, U, or N
100

Traffic count completed by encircling an area (CBD or activity center) with an imaginary boundary and counting vehicles and pedestrians at all points where they cross the boundary. 

What is a cordon count? 

100

A portable, powered, yellow, lens-directed enclosed 'W_______' light used in a temporary traffic control zone in either a steady burn or a flashing mode. 

What is Warning Light?

100

CBD stands for THIS, which is generally in the middle of a city. 

What is Central Business District?

100

AASHTO stands for THIS association representing highway and transportation departments in the 50 states, the District of Columbia, and Puerto Rico. 

What is American Association of State Highway and Transportation Officials?

100

A divided highway with full control of access. 

What is Freeway?

200

Type of study to measure the time between vehicles to initiate a conflicting maneuver. 

What is gap acceptance? 

200

Beginning with 'O' the name for vehicles that are traveling toward and to the right of each other.

What is Opposing Traffic?

200

TOD stands for THIS type of development that maximizes the amount of residential, business and leisure space within walking distance of public transport.

What is Transit-Oriented Development?

200

MOE stands for THIS, and correspond to accomplishment of mission objectives and achievement of desired results. 

What is Measure oEffectiveness?

200

A term that refers to a location that is encountered by traffic prior to a downstream location. 

What is Upstream? 

300

A study to identify safety concerns by observing evasive actions at a location, such as braking or weaving.

What is a traffic conflict study?

300

An 'R_______' interval that can follow a yellow change interval and precedes the next conflicting green interval.

What is Red (Clearance) Interval? 

300

TIA stands for THIS review of trips generated by a new lane use development. 

What is Transportation (Traffic) Impact Analysis?

300

SSD stand for THIS, which is the length of roadway ahead that is visible to the driver. 

What is stopping sight distance?

300

The 5-letter acronym for this organization of cities that work together on transportation issues.

What is NACTO?

400

Short-term but continuous count that is performed at one location over a period of 24-72 hours. 

What is a coverage count? 

400

This can describe the 'D______' mode for a traffic signal when the power supply is lost or turned off.

What is Dark?

400

MOD stands for THIS concept based on the principle that transportation is a commodity where modes have economic value. 

What is Mobility oDemand?

400

WTS stands for THIS group that in part attracts, connects and advances women's careers to strengthen the transportation industry. 

What is Women's Transportation Seminar?

400

Type of flow where vehicles traversing a length of roadway are not required to stop by any cause external to the traffic stream, such as traffic control devices.

What is Uninterrupted?

500

Used to time signals and estimate intersection capacity, this measurement counts the number of vehicles that can pass a given point on a highway in a given period of time. 

What is saturation flow? 

500
Beginning with 'S', it's the third word of a qualitative measure of traffic flow. 

What is Service (Level of Service)?

500

MaaS stands for THIS concept of a mobility marketplace in which a traveler can access multiple transportation services over a single digital interface. 

What is Mobility aa Service?

500

RSA stand for this activity to evaluate safety. 

What is Road Safety Audit or Road Safety Assessment?

500

A mode of operation at a traffic signal in which one indication in each vehicular signal face is turned on and off repetitively. 

What is Flashing Mode?

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