int=0_section_4_shortframeidlanenovehicleid

data.transportation.gov | Last Updated 1 Dec 2018

Researchers for the Next Generation Simulation (NGSIM) program collected detailed vehicle trajectory data on southbound US 101 and Lankershim Boulevard in Los Angeles, CA, eastbound I-80 in Emeryville, CA and Peachtree Street in Atlanta, Georgia. Data was collected through a network of synchronized digital video cameras.NGVIDEO, a customized software application developed for the NGSIM program, transcribed the vehicle trajectory data from the video. This vehicle trajectory data provided the precise location of each vehicle within the study area every one-tenth of a second, resulting in detailed lane positions and locations relative to other vehicles. Click the "Show More" button below to find additional contextual data and metadata for this dataset.

Tags: intelligent transportation systems (its), its joint program office (jpo), next generation simulation (ngsim) vehicle trajectories, us 101, i-80, trajectories, lankershim boulevard, peachtree st, los angeles, emeryville, california, atlanta, georgia, arterial, freeway

This dataset has the following 25 columns:

Column NameAPI Column NameData TypeDescriptionSample Values
Vehicle_IDvehicle_idnumberVehicle identification number (ascending by time of entry into section). REPEATS ARE NOT ASSOCIATED.
Frame_IDframe_idnumberFrame Identification number (ascending by start time)
Total_Framestotal_framesnumberTotal number of frames in which the vehicle appears in this data set
Global_Timeglobal_timenumberElapsed time in milliseconds since Jan 1, 1970.
Local_Xlocal_xnumberLateral (X) coordinate of the front center of the vehicle in feet with respect to the left-most edge of the section in the direction of travel.
Local_Ylocal_ynumberLongitudinal (Y) coordinate of the front center of the vehicle in feet with respect to the entry edge of the section in the direction of travel.
Global_Xglobal_xnumberX Coordinate of the front center of the vehicle in feet based on CA State Plane III in NAD83. Attribute Domain Val
Global_Yglobal_ynumberY Coordinate of the front center of the vehicle in feet based on CA State Plane III in NAD83.
v_lengthv_lengthnumberLength of vehicle in feet
v_Widthv_widthnumberWidth of vehicle in feet
v_Classv_classnumberVehicle type: 1 - motorcycle, 2 - auto, 3 - truck
v_Velv_velnumberInstantaneous velocity of vehicle in feet/second.
v_Accv_accnumberInstantaneous acceleration of vehicle in feet/second square.
Lane_IDlane_idnumberCurrent lane position of vehicle. Lane 1 is farthest left lane; lane 5 is farthest right lane. Lane 6 is the auxiliary lane between Ventura Boulevard on-ramp and the Cahuenga Boulevard off-ramp. Lane 7 is the on-ramp at Ventura Boulevard, and Lane 8 is the off-ramp at Cahuenga Boulevard.
O_Zoneo_zonetextOrigin zones of the vehicles, i.e., the place where the vehicles enter the tracking system. There are 11 origins in the study area, numbered from 101 through 111. Please refer to the data analysis report for more detailed information.
D_Zoned_zonetextDestination zones of the vehicles, i.e., the place where the vehicles exit the tracking system. There are 10 destinations in the study area, numbered from 201 through 211. Origin 102 is a one-way off-ramp; hence there is no associated destination number 202. Please refer to the data analysis report for more detailed information.
Int_IDint_idtextIntersection in which the vehicle is traveling. Intersections are numbered from 1 to 4, with intersection 1 at the southernmost, and intersection 4 at the northernmost section of the study area. Value of “0” means that the vehicle was not in the immediate vicinity of an intersection and that the vehicle instead identifies with a section of Lankershim Boulevard (Section_ID, below). Please refer to the data analysis report for more detailed information.
Section_IDsection_idtextSection in which the vehicle is traveling. Lankershim Blvd is divided into five sections (south of intersection 1; between intersections 1 and 2, 2 and 3, 3 and 4; and north of intersection 4). Value of “0” means that the vehicle does not identify with a section of Lankershim Boulevard and that the vehicle was in the immediate vicinity of an intersection (Int_ID above). Please refer to the data analysis report for more detailed information
DirectiondirectiontextMoving direction of the vehicle. 1 - east-bound (EB), 2 - north-bound (NB), 3 - west-bound (WB), 4 - south-bound (SB).
MovementmovementtextMovement of the vehicle. 1 - through (TH), 2 - left-turn (LT), 3 - right-turn (RT).
PrecedingprecedingnumberVehicle ID of the lead vehicle in the same lane. A value of '0' represents no preceding vehicle - occurs at the end of the study section and off-ramp due to the fact that only complete trajectories were recorded by this data collection effort (vehicles already in the section at the start of the study period were not recorded).
FollowingfollowingnumberVehicle ID of the vehicle following the subject vehicle in the same lane. A value of '0' represents no following vehicle - occurs at the beginning of the study section and onramp due to the fact that only complete trajectories were recorded by this data collection effort (vehicle that did not traverse the downstream boundaries of the section by the end of the study period were not recorded).
Space_Headwayspace_headwaynumberSpace Headway in feet. Spacing provides the distance between the frontcenter of a vehicle to the front-center of the preceding vehicle.
Time_Headwaytime_headwaynumberTime Headway in seconds. Time Headway provides the time to travel from the front-center of a vehicle (at the speed of the vehicle) to the front-center of the preceding vehicle. A headway value of 99
LocationlocationtextName of street or freeway