V* - Headers Describing Observation Records

Observation Record Fields

Indicates the fields recorded in each observation (vehicle) record

VV vfield1[,vfield2...]

vfield(x) [REQUIRED]

This parameter may be repeated

A Value for this parameter must be one of the following:

Value	Units	Meaning	More Information
vehicleid		Vehicle ID	64-bit (signed) integer value representing a sequence number
speed	FU speed	Observed speed	Negative values means reverse direction.
naxles		Number of axles
wbase	FU length	Wheelbase	Distance between the first and last axle of a vehicle
length	FU length	Length	Length of the observation
overhang	FU length	Overhang	Length of the portion overhanging the back axle
delay	seconds	Delay	Duration of time a vehicle was delayed or parked
chassisheight	FU length	Chassis height	Height of a vehicle chassis above the surface
chassiscode		Chassis code	A vehicle chassis code can be any Long integer value
width	FU length	Width	Width of the observation
height	FU length	Height	Height of the observation. This is how tall the object is, not its height above sea level.
mass	FU mass	Mass	Mass of the observation
masstare	FU mass	Tare Mass	Tare mass of a vehicle. This can also be called the 'curb weight' or 'unladen weight'.
masslegal	FU mass	Legal Mass	Legal mass of the vehicle
color	6-digit RGB	Color	The measured vehicle color. Eg FF0000 is 'red'
center	FU length	Distance from center	Distance from the center of the lane
tsig		Traffic Signal	State of the traffic signal controlling the vehicle
vclass		Type Class (primary)	An observed type classification which may be defined in the 'TC' header field
vclass1		Type Class (alternate 1)	An alternate (1) type classification
vclass2		Type Class (alternate 2)	An alternate (2) type classification
vclassl		Length Class	A length classification. This property is derived by comparing against a length-based classification system which may be defined in the 'TL' header field
qc		Quality Rating	A numeric value assigned by the sensing equipment. This can explain how a vehicle was resolved (or 'coerced'), or whether the vehicle missed a sensor
tempair	Degrees centigrade	Air temperature
age	Years	Age	Age of the observation: this may be a vehicle, its driver or a pedestrian
idtag		ID Tag	Identity tag of the observation such as its registration number
mac		MAC Address	MAC address of the observation. Default format is an unsigned Long value, not 6 hex values. See 'FU' header for details on how to change this format.
rssi		Received Signal Strength Indicator	(Since 1.261) Used for wireless or bluetooth devices. A value of 0 typically means full strength while a large negative value indicates low strength.
bttype		Bluetooth Type	(Since 1.261) Type of bluetooth device signal 0 - Standard (V2 Bluetooth) 1 - Low Energy Public (V4 Bluetooth) 2 - Low Energy Random (V4 Bluetooth)
bayid		Parking bay	Identifier of a parking bay or berth
lat	Degrees (-90 to 90)	Latitude	Latitude of the observation
lng	Degrees (-180 to 180)	Longitude	Longitude of the observation
img	Base 64	Image	Image of the observation
imgfile	URL	Image File	Reference to an image file of the observation

Examples:

VV speed,vclass,wbase,naxles

Observation sub-component record fields

These fields describe subcomponents of an observation. For a vehicle record, these are axles.

VA axle_field1[,axle_field2...]

axle_field(x) [REQUIRED]

This parameter may be repeated

A Value for this parameter must be one of the following:

Value	Units	Meaning	More Information
aspace	FU length	Axle spacing	Spacing between the current axle and a leading axle. The first axle spacing is always zero.
amass	FU mass	Axle weight	Weight on one axle
alrb	From 0 to 100	Axle left/right balance	How weight is distributed between the two sides of the axle. 0 means all weight is on the left side. 100 means all weight is on the right side. 50 means evenly distributed

Examples:

VA aspace