TMDD

Traffic Management Data Dictionary

TSC

Traffic Signal Controller

traffic signal phase overload

proceed manoeuvre that has been terminated while demand for the manoeuvre continues
NOTE 1 to entry: Repeated phase overloads indicate that the signal phase timing is not adequate to satisfy the demand.

proceed manoeuvre that has been terminated while demand for the manoeuvre continues
NOTE 1 to entry: Repeated phase overloads indicate that the signal phase timing is not adequate to satisfy the demand.

TTA

Transport Ticketing Authority

TLM

trust list manager

USDOT

US Department of Transportation

NHTSA

(US) National Highways Traffic Safety Administration

VII

vehicle infrastructure integration

V-ITS

vehicle intelligent transport systems

VANET

vehicular ad hoc network

velocity

an object's speed and direction of motion
NOTE 1 to entry: Velocity is a physical vector quantity; both magnitude and direction are needed to define it.
The scalar absolute value (magnitude) of velocity is called speed, a unit whose quantity is measured in the
international system of units as metres per second (m/s).

an object's speed and direction of motion
NOTE 1 to entry: Velocity is a physical vector quantity; both magnitude and direction are needed to define it.
The scalar absolute value (magnitude) of velocity is called speed, a unit whose quantity is measured in the
international system of units as metres per second (m/s).

VRU

vulnerable road user (typically, a pedestrian may include bicycle rider)

WSMP

wave short message protocol

WLAN

Wireless Local Area Network

wireline

traditional permanent ‘wired’ connection (although may in reality include microwave and other wireless connections)

traditional permanent ‘wired’ connection (although may in reality include microwave and other wireless connections)

work zone

area of a highway with construction, maintenance, or utility work activities
NOTE 1 to entry: A work zone is typically marked by signs, channelizing devices, barriers, pavement markings, and/or work vehicles.
NOTE 2 to entry: A work zone extends from the first warning sign or high-intensity rotating, flashing, oscillating, or strobe lights on a vehicle to the END ROAD WORK sign or the…

area of a highway with construction, maintenance, or utility work activities
NOTE 1 to entry: A work zone is typically marked by signs, channelizing devices, barriers, pavement markings, and/or work vehicles.
NOTE 2 to entry: A work zone extends from the first warning sign or high-intensity rotating, flashing, oscillating, or strobe lights on a vehicle to the END ROAD WORK sign or the last Temporary Traffic Control device.