Old Dominion Freight Line Inc. is expanding its service into Canada with the relocation and expansion of its Detroit Service Center.

Old Dominion, which has maintained a presence in Troy for 11 years, moved into a larger facility located on a 16-acre site in Troy. The terminal is strategically located along the Interstate 75 corridor, allowing for overnight service into parts of Ontario.

The relocation is part of a $90 million to $120 million investment Old Dominion has committed to real estate purchases and expansion projects in 2012. With the relocation, Old Dominion increased its workforce at the Detroit terminal by 20%.

The Detroit terminal, which includes a new repair shop, provides direct service to a number of cities throughout the region, including Auburn Hills, Chesterfield, Ferndale, Lapeer, Oak Park, Pt. Huron, Madison Heights, Royal Oak and Warren.

The company operates a total of seven terminals in Michigan. Last month, the company relocated its Grand Rapids Service Center to a larger facility.