construction on the highway from severn to linthicum became a high priority with the united states' entrance into world war i; the remainder of the severn–linthicum highway and the highway from the railroad at severn southwest to newly established camp meade, now collectively called the camp meade road, were paved in concrete between 1916 and 1919. belle grove road from pumphrey to brooklyn park was also paved in concrete in this period of time. a poorly constructed portion of the camp meade road between wellham crossroads and dorsey road was repaved with asphalt in 1919. md 170 was relocated at the railroad crossing when the highway's overpass of the pennsylvania railroad was completed in 1931. the old road, which is now severn station road west of the tracks and old camp meade road to the east, became md 483.