Vital Signs: Traffic Volumes At Regional Gateways - Bay Area

VITAL SIGNS INDICATOR

Traffic Volumes at Regional Gateways (T6)

FULL MEASURE NAME

Daily vehicles along entry/exit points to the Bay Area

LAST UPDATED

April 2020

DESCRIPTION

Traffic volumes at regional gateways refers to the number of vehicles crossing county boundaries on a typical day to enter or exit the nine-county San Francisco Bay Area.

DATA SOURCE

California Department of Transportation: Annual Traffic Volume Reports

http://traffic-counts.dot.ca.gov

CONTACT INFORMATION

vitalsigns.info@mtc.ca.gov

METHODOLOGY NOTES (across all datasets for this indicator)

Traffic counts reflect average annual daily traffic (AADT) counts at all state highway gateway points - entry/exit points to the nine-county San Francisco Bay Area. When the county line data was not available in the traffic volume reports, the closest intersection or interchange was used as a proxy for traffic volumes at the county line.

Querying over HTTP

Splitgraph serves as an HTTP API that lets you run SQL queries directly on this data to power Web applications. For example:

curl https://data.splitgraph.com/sql/query/ddn \
    -H "Content-Type: application/json" \
    -d@-<<EOF
{"sql": "
    SELECT *
    FROM \"bayareametro-gov/vital-signs-traffic-volumes-at-regional-gateways-qxtv-4dfe\".\"vital_signs_traffic_volumes_at_regional_gateways\"
    LIMIT 100 
"}
EOF

See the Splitgraph documentation for more information.