National Summaries 2018
State DOT will provide VMT. This data is summarized by Paved and Unpaved and by Vehicle Type.
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 \"datahub-transportation-gov/national-summaries-2018-u7gh-36sf\".\"national_summaries_2018\"
LIMIT 100
"}
EOF
See the Splitgraph documentation
for more information.