Abstract: Abstract: The data included in the GIS Traffic Stations Version database have been assimilated from station description files provided by FHWA for Weigh-in-Motion (WIM), and Automatic Traffic Counters (ATR). Location referencing information was derived from the National Highway Planning Network version 4.0. and State offices of Transportation The attributes on the point elements of the database have come from two primary sources, the Station Description Records and the National Highway Planning Network's Linear Referencing System. The attributes for these databases have been intentionally limited to location referencing attributes since the core station description attribute data are contained within the Station Description Tables (SDT). There is a separate Station Description Table (SDT) for each of the different station types; WIM, and ATR. The attributes in the Station Description Table correspond with the Station Description Record found in Chapter 6 of the latest Traffic Monitoring Guide. The SDT contains the most recent stations available for each state and station type. This table was derived from files provided UTCTR by FHWA. The Station Description Table can be linked to the station shapefile via the STNNKEY field . A single exception table containing records for those stations that could not be located is provided for WIM, and ATR stations. Generally, this table contains records where location descriptions were not clear enough to locate a station. It is hoped that FHWA will be able to contact the States for a more detailed description

Purpose: Purpose: The GIS Traffic Stations database provides structural linkages between the National Highway Planning Network Weigh In Motion (WIM), and Automatic Traffic Count Stations (ATR)

Field Number	Attribute	Description	Data Type
0	FID	Internal feature number.	Long Integer representing an object identifier
1	Shape	Feature geometry.	Geometry
2	STTNKEY	Unique Station Identifier: Concatenated State FIPS code and Unique Station ID	Character String
3	STTNID	Unique ID designated to each point	Character String
4	NHS	Indicates whether the section is on the National Highway System (NHS) or is an NHS connector to an intermodal facility.	Integer
5	LOCATION	Station Location Description	Character String
6	CONFIDENCE	Confidence that point was created correctly using the data provided	Double Precision Floating Point
7	COMMENT	Notes on point creation and relationship to location	Character String
8	LONGITUDE	The longitude of the point expressed as a signed real number. This value is in decimal degrees with negative values indicating West longitude and positive values indicating East longitude.	Double Precision Floating Point
9	LATITUDE	The latitude of the point expressed as a signed real number. This value is in decimal degrees with negative values indicating South latitude and positive values indicating North latitude.	Double Precision Floating Point
10	STPOSTAL	State Postal Code Abbreviations	Character String
11	AADT	Annual Average Daily Traffic (2005)	Long Integer
12	YEAR_GEO	Year the location was spatial located	Double Precision Floating Point
13	FCLASS	The functional system upon which the section is located.	Character String
14	STFIPS	State FIPS Code	Character String
15	CTFIPS	3 digit code for where the point resides	Character String
16	VERSION	Version of the database	Character String