Variable Description

trucknum Truck number

config

Trailer configuration:

1 = Phase 1 trailer (40 CFR 1037.501)

2 = Phase 1 trailer with trailer skirt

3 = Phase 1 trailer with trailer skirt and trailer tail

run Run number

direction

Direction of travel:

1 = East

-1 = West

coasttime_s Time since start of run

vehspeed_mph Vehicle speed

airspeed_mph

Air speed, 

measured from onboard anemometer

airdirection_deg

Yaw angle of attack of air, 

measured from onboard anemometer

airelevation_deg

Pitch angle of attack of air, 

measured from onboard anemoemeter

windspeedstat_mph

Wind speed, 

measured from stationary road side weather station

winddirectionstat_deg

Wind direction, 

measured from stationary road side weather station

ambtempstat_F

Ambient temperature,

measured from stationary road side weather station

ambpressstat_inHg

Ambient air pressure,

measured from stationary road side weather station

weight_lb Vehicle weight

grade_SwRI

Road grade,

taken from survey conducted by Southwest Research Institute

grade_USGS

Road grade,

data from USGS National Elevation Dataset, filtered by NREL
Units

N/A

N/A

N/A

N/A

sec

mph

mph

degrees, relative to centerline of vehicle

degrees, relative to horizontal plane

mph

degrees

0° = wind from the west, 

90° = wind from the north, and so on

°F

in Hg

lb

[], multiply by 100 to get percent grade

[], multiply by 100 to get percent grade
Variable Description

trucknum Truck number

config

Trailer configuration:

1 = Phase 1 trailer (40 CFR 1037.501)

2 = Phase 1 trailer with trailer skirt

3 = Phase 1 trailer with trailer skirt and trailer tail

testnum Test number; n th repeat of truck-configuration test

run Run number

direction

Direction of travel:

1 = East

-1 = West

nominalspeed_mph Nominal target speed

time Time of day

vehspeed_mph Vehicle speed

airspeed_mph

Air speed, 

measured from onboard anemometer

airdirection_deg

Yaw angle of attack of air, 

measured from onboard anemometer

airelevation_deg

Pitch angle of attack of air, 

measured from onboard anemoemeter

engspeed_rpm Engine speed

LFspeed_rpm Left front drive wheel speed

RFspeed_rpm Right front drive wheel speed

LRspeed_rpm Left rear drive wheel speed

RRspeed_rpm Right rear drive wheel speed

shafttorque_Nm Transmission output driveshaft torque

LFtorque_lbft Left front drive wheel torque

RFtorque_lbft Right front drive wheel torque

LRtorque_lbft Left rear drive wheel torque

RRtorque_lbft Right rear drive wheel torque

transgearratio Transmission gear ratio

axleratio Drive axle ratio

windspeedstat_mph

Wind speed, 

measured from stationary road side weather station

winddirectionstat_deg

Wind direction, 

measured from stationary road side weather station

ambtempstat_F

Ambient temperature,

measured from stationary road side weather station

ambpressstat_inHg

Ambient air pressure,

measured from stationary road side weather station

weight_lb Vehicle weight

grade_SwRI

Road grade,

taken from survey conducted by Southwest Research Institute

grade_USGS

Road grade,

data from USGS National Elevation Dataset, filtered by NREL
Units

N/A

N/A

N/A

N/A

N/A

mph

sec

mph

mph

degrees, relative to centerline of vehicle

degrees, relative to horizontal plane

rpm

rpm

rpm

rpm

rpm

N-m

lb-ft

lb-ft

lb-ft

lb-ft

[]

[]

mph

degrees

0° = wind from the west, 

90° = wind from the north, and so on

°F

in Hg

lb

[], multiply by 100 to get percent grade

[], multiply by 100 to get percent grade