Three-digit numbered routes from 700s to 900s are usually short connectors and spurs.

In 1928, Mississippi Governor Theodore G. Bilbo appointed Horace Stansel head of a committee to investigate the state's highway needs.

Things changed when the state legislature launched the $1.3 billion Four-Lane Highway Program of 1987.

[2] This program gradually allowed for the funding of over 1,000 miles (1,600 km) of four-lane highway statewide.

MDOT was not created until 1992; this organization consolidated several services that already existed.