State Route 378 is a short, four lane highway that runs west-to-east entirely in Gwinnett County

Gwinnett County, Georgia

, Gwinnett County had a population of 805,321. The racial and ethnic composition of the population was 53.3% white , 23.6% black , 2.7% Korean, 2.6% Asian Indian, 2.0% Vietnamese, 3.3% other Asian, 0.1% Pacific Islander, 8.8% some other race and 3.1% from two or more races...

 in north-central Georgia

Georgia (U.S. state)

Georgia is a state located in the southeastern United States. It was established in 1732, the last of the original Thirteen Colonies. The state is named after King George II of Great Britain. Georgia was the fourth state to ratify the United States Constitution, on January 2, 1788...

, USA. From its western terminus at U.S. 23/S.R. 13

State Route 13 (Georgia)

State Route 13 , known as Buford Highway, Falcon Parkway, and Atlanta Highway, is a state highway in Georgia. It begins at West Peachtree Street and Spring Street just to the north of 17th Street in north Midtown Atlanta. The section near downtown Atlanta is a full freeway, from its south end to...

 in Norcross

Norcross, Georgia

As of 2010 Norcross had a population of 9,116. The racial and ethnic composition of the population was 40.8% white , 19.8% black or African American , 0.7% Native American, 2.1% Asian Indian, 10.7% Asian, 0.1% Pacific Islander, 21.5% from some other race and 4.3% reporting two or more races...

, it runs east, crossing over Interstate 85 before coming to its eastern terminus at U.S. 29

U.S. Route 29

U.S. Route 29 is a north–south United States highway that runs for from the western suburbs of Baltimore, Maryland, to Pensacola, Florida. This highway's northern terminus is at Maryland Route 99 in Ellicott City, Maryland...

/S.R. 8 in Lilburn

Lilburn, Georgia

As of 2010 Lilburn had a population of 11,596. The median age was 36.3. The racial and ethnic composition of the population was 52.7% white , 16.4% black or African American, 0.5% Native American, 4.8% Asian Indian, 10.4% other Asian, 12.3% from some other race and 2.8% from two or more races...

. The route is heavily commercialized with numerous office and industrial park

Industrial park

An industrial park is an area zoned and planned for the purpose of industrial development...

s. It is signed as Beaver Ruin Road.