MD 650; MD 108 was extended east along old US 29 from Ashton to Columbia and along MD 539 to MD 175 at Jonestown. MD 175 was relocated to its and MD 108's present divided highway west of I-95 in 1969 in conjunction with the construction of the I-95–MD 175 interchange between then and 1971. When MD 175 was relocated to its present alignment through Columbia in 1977, MD 108 was extended along old MD 175 to its present eastern terminus. MD 108 was expanded to a four-lane divided highway on either side of US 29 in conjunction with the construction of the interchange in 1987 and 1988. The state highway was expanded to a four-lane divided highway through Olney in 1994. MD 108's interchange with MD 32 was built in 1996. Junction list Auxiliary routes MD 108 has two auxiliary routes: MD 108A is the designation for Thomas Williams Way, a service road from a dead end east to MD 981 (Tricross Drive) at the MD 108–MD 104 intersection. The service road provides access to several homes and two churches. Prior to 2013, MD 108A extended to MD 108. MD 108H is the designation for Presbyterian Circle, a service road from MD 108 west to a dead end adjacent to the MD 108–US 29 interchange. The service road provides access to a church and a park-and-ride. See also References External links MDRoads: MD 108 108 Maryland Route 108 Maryland Route 108