OneBusAway provides an API for exporting data in the GTFS-realtime format. The API supports methods for retrieving GTFS-realtime feeds on a per agency basis in all three major datatypes:
- alerts
- trip updates
- vehicle positions

he TIGER/Line Files are shapefiles and related database files (.dbf) that are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line File is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. Census Blocks are statistical areas bounded on all sides by visible features, such as streets, roads, streams, and railroad tracks, and/or by nonvisible boundaries such as city, town, township, and county limits, and short line-of-sight extensions of streets and roads. Census blocks are relatively small in area; for example, a block in a city bounded by streets. However, census blocks in remote areas are often large and irregular and may even be many square miles in area. A common misunderstanding is that data users think census blocks are used geographically to build all other census geographic areas, rather all other census geographic areas are updated and then used as the primary constraints, along with roads and water features, to delineate the tabulation blocks. As a result, all 2010 Census blocks nest within every other 2010 Census geographic area, so that Census Bureau statistical data can be tabulated at the block level and aggregated up to the appropriate geographic areas. Census blocks cover all territory in the United States, Puerto Rico, and the Island Areas (American Samoa, Guam, the Commonwealth of the Northern Mariana Islands, and the U.S. Virgin Islands). Blocks are the smallest geographic areas for which the Census Bureau publishes data from the decennial census. A block may consist of one or more faces.

Traffic cameras in Seattle owned by SDOT and WSDOT

Vehicle traffic volumes for arterial streets in Seattle based on spot studies that have been adjusted for seasonal variation. To provide a high level view of traffic volumes on major streets in Seattle, and compare changes from year to year. The AAWDT count is a seasonally adjusted average weekday daily total of vehicle traffic for all lanes, i.e. total vehicles in both directions for one average 24-hour business day, Monday through Friday. Only selected arterial streets are included.

App developers can find live station data through our JSON feed. For those who would rather leave the programming to someone else, see where bikes are on our website map or mobile app.

Park Label

Includes signs installed and maintained by the Seattle Department of Transportation within the public right of way. The inventory is maintained in SDOT’s Infor/Hansen Asset Management System, and displayed in GIS as point events along a block face. To download the shapefile set or the kmz (compressed kml) right click on the file in the Attachment section and select Save As and select where you want it saved.

Underlying data for the KC Water Taxi Watch (http://www.wsdot.com/ferries/vesselwatch/vesselskcm.ashx) from WSDOT.

A wide range of GIS data from King County.

Traffic flow volumes at Permanent Traffic Recorder sites (see attachment) of the various vehicle classification types (see attachment).