[1] Most roads within the county are short connectors, while others are sections of 30-mile (48 km) long highways.

[2] Exits off the highway serve Glens Falls, Queensbury, Warrensburg, Lake George, Bolton Landing, and Chestertown.

[2][4] Since its designation in 1926,[5] US 9 services the city of Glens Falls, Queensbury, the village of Lake George, Warrensburg and Chestertown before leaving for Essex County.

[9] Another route, NY 47, was assigned by 1926 to an alignment extending from Chestertown to Ticonderoga via Hague.

[10] NY 6 was replaced by US 9 in 1927,[11] and the three other routes were realigned out of the county or eliminated as part of the 1930 renumbering.

It was partially replaced by NY 254, a northeasterly bypass of Glens Falls from I-87 to Washington County.

[25] The longest of Warren County's three reference routes is NY 917A,[2] better known as the Prospect Mountain Veterans Memorial Highway.

[25] The final reference route is NY 912Q, a two lane freeway spur leading east from I-87 exit 22.

The Warren County Highway Department uses an average of 9,000 short tons (8,165 t) of salt on the roads around the Lake George area annually.

The salt is beginning to flow into the lake, causing a harmful environmental impact.

Local officials recognize the problem at hand and are trying to find ways to minimize salt usage.

The chart below shows current Interstate, U.S., and state highways by year of creation, length, and towns crossed.

[36] Route numbers, lengths, and termini were derived from the 2010 NYSDOT Warren County inventory unless otherwise noted.