SR 30 begins at an intersection with US 1 south of Doswell in northeastern Hanover County. The state highway heads east as Kings Dominion Boulevard, a two-lane road that heads east and crosses over CSX's RF&P Subdivision on a very wide bridge. Just east of the railroad crossing, SR 30 meets I-95 at a partial cloverleaf interchange Immediately to the east of the railroad crossing, SR 30 intersects SR 725, which leads to the ramp from southbound I-95 to Kings Dominion. SR 30 continues east to its interchange with I-95, which includes direct ramps between southbound I-95 and the entrance to Kings Dominion. Access to the ramp from SR 30 is provided indirectly from SR 725 between the railroad crossing and the interchange. At I-95, SR 30 expands to a four-lane divided highway. East of I-95, SR 30 passes between a truck stop and the parking lot of Kings Dominion, which is accessed by either Theme Park Way or the direct entrance immediately to the east. SR 30 crosses CSX's Piedmont Subdivision at grade before crossing the North Anna River into Caroline County. Just east of the river, the state highway, now known as Dawn Boulevard, passes through the hamlet of Hart Corner, which contains Meadow Event Park, the home of the Virginia State Fair starting in 2009. East of the event park, SR 30 reduces to a two-lane highway and continues east to Bowersville, also known as Dawn, where the highway intersects US 301 and SR 2. SR 30 continues east into King William County, where the highway is named King William Road. The state highway passes through the hamlets of Calno, Mangohick, Epworth, Pollards Corner, and Turpin before reaching its intersection with US 360 in the village of Central Garage. SR 30 continues southeast through Rumford to the unincorporated county seat of King William. The King William County Courthouse, which was constructed in 1725, is the oldest continually used courthouse building in the United States. The state highway continues southeast through the hamlet of Romancoke to the town of West Point, which is located at the southeastern end of King William County where the Pamukey and Mattaponi Rivers merge to form the York River. SR 30 turns west onto four-lane 14th Street to join SR 33 in a concurrency. The two state highways cross the Eltham Bridge over the Pamunkey River into New Kent County. SR 30 and SR 33 head west as four-lane Eltham Road through the village of Eltham, where the highway meets the northern terminus of SR 273, which was formerly part of SR 30. West of the village, the two highways widen to a divided highway west until the concurrency ends at New Kent Highway, which heads west as SR 249 and southeast as SR 30. SR 30 meets the southern end of SR 273 in Barhamsville, then enters James City County. A short distance south of the county line, the state highway, now named Old Stage Road, expands to a four-lane divided highway and meets I-64 at a partial cloverleaf interchange. SR 30 continues south as Barhamsville Road to its intersection with US 60 north of Toano. SR 30 is marked to the north and east legs of the intersection and US 60 is assigned to the south and west legs of the intersection, meaning staying on the same highway requires making a turn. SR 30 heads east as Rochambeau Drive, which is a four-lane divided highway until reducing to two lanes shortly before reaching an intersection with SR 607 and SR 755 north of Norge. SR 30 turns north onto Croaker Road, a four-lane divided highway, and passes through a full cloverleaf interchange with I-64. SR 30's northern terminus is at the northern edge of the interchange; Croaker Road continues north as SR 607 toward Croaker.
