1891-1903 - Boise Rapid Transit Co.
1903-1907 - Boise Traction Co.
1907-1912 - Boise Railroad Co.
1912-1915 - Idaho Railway Light & Power Co.
1915-1917 - Boise Railroad Co.
1917-1921 - Boise Railway Co.
1921-1947 - Boise Street Car Co.
1947 - streetcars replaced with buses operated by new company
After 1947 - Boise Bus Co.
1977-2002 - Boise Urban Stages (B.U.S.)
Caldwell
1907-1910 - Caldwell Interurban Railway Co.
1910-1924 - Caldwell Traction Co.
1924-1928 - Idaho Traction Co.
1928 - streetcars discontinued
Private bus co. in 1952 - Caldwell Bus Co.
Nampa
Private bus co. in 1952 - Nampa City Lines
CURRENT TRANSIT SYSTEM (SINCE 2002)
Valley Regional Transit
HISTORIC INTERURBAN RAILWAYS
Boise Valley Traction/Caldwell Traction
1940's-1952 - Idaho Falls Motor Coach Co.
Lewiston
1908-1910 - Lewiston & Southeastern Electric Railway Co.
1915-1929 - Lewiston-Clarkston Transit Co.
1926 - buses introduced
1929 - streetcars discontinued
Private bus co. in 1952 - Chapin's Transit
HISTORIC INTERURBAN RAILWAY
Lewiston-Clarkston (1915-1929)
Pocatello
1952 - Tarr Bus Lines
1953-1955 - Pocatello Transit Co.
1956-1960 - Gate City Bus Line
Sandpoint
1909-1917 - Sandpoint & Interurban Railway Co.
1917 - streetcars discontinued
HISTORIC INTERURBAN RAILWAY
Sandpoint-Kootenai (1909-1917)
Twin Falls
1910's-1915 - Twin Falls Railway Co.
1915-1919 - Twin Falls Railroad Co.
1919 - streetcars discontinued
Private bus co. in 1952 - Twin Falls Motor Transit