T* - Headers Describing Tally Records

Header Key	Description
TC	Tally Type Classification
TD	Tally Duration
TF	Tally Totals
TL	Tally Length Classification
TO	Tally Component Ordering
TS	Tally Speed Classification

Tally Type Classification

Where objects are counted by "type", this field is used to describe the type classification system used. Even if you don't store tallies, this may be used to describe the observation's 'vclass' attribute.

TC class_name,highest_id,_ignore_,lowest_id

class_name [REQUIRED]: A short name to reference this type classification system. This may also be the numeric identifier of a registered classification system. See registered classification systems
highest_id [REQUIRED]: The highest class ID used in this system
_ignore_ [optional]: This parameter is not currently used. Enter as blank.
lowest_id [optional]: DEFAULT: 0
If used, set this to either 0 or 1 to indicate what the lowest meaningful value in the classification system is

Note: You can provide labels for elements in this record using a SL header.

Examples:

TC austroads94,13,,1

A system called 'austroads94' with 13 as the highest classification and 1 the lowest. In this case the TC_component in the T body record will contain 14 elements because it begins with element 0. See the T body record for more.

TC fhwaschemef,14

A system called 'fhwaschemef' with 14 as the highest classification and 0 the lowest. In this case the TC_component in the T body record will contain 15 elements because it begins with element 0. See the T body record for more.

Tally Duration

The period of each tally record

TD value

value [REQUIRED]

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

Value	Meaning	More Information
off	Not recording tallies
m1	1 minutes	1 minute
m5	5 minutes	5 minutes
m15	15 minutes	15 minutes
hr	1 hour	1 hour (60 minutes)
day	1 day	1 day (24 hours, 1440 minutes)
month	1 month
year	1 year

Note: You can use values without the 'm'. For example, '15' is the same as 'm15'

Examples:

TD off

No tallies ('T' records) recorded

TD 60

Tally data contains 60 minute increments

TD 15

Tally data contains 15 minute increments. This means tally sub-periods will be used.

Default Behavior:

If this record is not present in the file, the following record is implied

TD off

Tally Totals

Describes the statistics recorded in the tally record.

TF totalfield1[,totalfield2...]

totalfield(x) [REQUIRED]

This parameter may be repeated

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

Value	Meaning	More Information
motorized	Motorized vehicles	Count of all motorized vehicles
peds	Pedestrians	Count of pedestrians
bike	Bicycles	Count of bicycles
axles	Axles	Count of motorized axles
sens1	Sensor 1	(Since 1.262) Count of events on sensor 1
sens2	Sensor 2	(Since 1.262) Count of events on sensor 2
speeds	Sum of Speeds	Sum of motorized vehicle speeds. This uses the speed units defined in the 'FU' header
speeda	Average Speed	Average speed of all observations. This uses the speed units defined in the 'FU' header
occupancy	Average Occupancy	Average occupancy as a fraction
tempair	Air temperature	Average air temperature in degrees centigrade
rssiavg	Average RSSI	(Since 1.261) Average received signal strength indicator, for bluetooth or wireless devices
aadt	AADT	Annual Average Daily Traffic
aadtpctchange	AADT percentage change	Percentage change between successive AADT values
aadtobs	AADT Observations	Number of AADT observations used to estimate another value
aadtacf	Axle Correction Factor	(Since 1.281) Axle correction factor expressed as axles per vehicle (0.5 = 2 axle vehicle).
qc	Quality Rating	A quality rating for counted values. This value is determined by the software producing the data.
truckpct	Percent Trucks	Percentage of trucks (commercial vehicles)
speedpct85	85th percentile speed	85th percentile speed. This uses the speed units defined in the 'FU' header

Examples:

TF motorized,axles

Tally Length Classification

Where objects are counted by "length", this field is used to describe the length classification system used.

TL class_name,cutoff_length1[,cutoff_length2...]

class_name [REQUIRED]

A short name to reference this length classification system. This may also be the numeric identifier of a registered classification system.

cutoff_length(x) [REQUIRED]

The right side of each length bin. The units are specified by the 'FU' record. The left side of the first length bin is 0. There is always an implied final bin which starts from the last cutoff_length value and extends to infinity.

This parameter may be repeated

Note: You can provide labels for elements in this record using a SL header.

Examples:

TL US_TPF_5_192,6.5,21.5,49.0

Describes a four bin system: 0 to 6.5, 6.5 to 21.5, 21.5 to 49.0, over 49.0 (this is the implied final bin)

Tally Component Ordering

Describes how to interpret the array of count values in each 'T' body record

TO component1[,component2...]

component(x) [optional]

The components of each tally ('T') count record

This parameter may be repeated

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

Value	Meaning
TF	Component related to TF: total count fields
TC	Component related to TC: tallied type classifications
TS	Component related to TS: tallied speed classifications
TL	Component related to TL: tallied length classifications
TP	Component related to speed by length (TP)

Examples:

TO TF,TS,TC

Each 'T' record will contain an array of binned counts for the TF, TS and TC components, in that order.

Default Behavior:

The default behavior is based on

which 'TF', 'TC', 'TS' and 'TL' records are present in the header
The "natural ordering" of these components, which is as follows: 'TF', 'TC', 'TS' and 'TL'

For example, if TO is not defined, and the header defines a TL and TC record, the components of the tally count values will be TC,TL. This is because the natural ordering shown above puts TL component values after TC.

Tally Speed Classification

Where objects are counted by "speed", this field is used to describe the speed classification system used.

TS class_name,speed_bins,speed_inc,speed_start

class_name [REQUIRED]: A short name to reference this speed classification system. This may also be the numeric identifier of a registered classification system.
speed_bins [REQUIRED]: The number of bins used in this classification system
speed_inc [REQUIRED]: Speed bin increment in the units specified by the 'FU' record. The left side of the first speed bin is 0.
speed_start [optional]: The width of the first speed bin in the units specified by the 'FU' record. If not set, this defaults to the speed_inc value

Note: You can provide labels for elements in this record using a SL header.

Examples:

TS spd10,10,10

There are 10 defined bins plus one implied final bin. The first bin spans 0 to 10. This means the tally record must have 11 bin counts in its speed component array.

TS spd05_start40,11,5,40

There are 11 defined bins plus one implied final bin. The first bin spans 0 to 40. Then follows 10 more bins, stepping every 5. The implied final bin will start at 90 and continue to infinity. This means the tally record must have 12 bin counts in its speed component array.