Friday, Oct. 30, through Sunday, Nov. 8, 2026
Interstate 90 at Piedmont is the one to plan around: eastbound I-90 closes overnight Tuesday through Thursday next week. U.S. Highway 16A remains closed in Keystone, and Rapid City has more than a dozen street projects, four of them with estimated completion dates between Friday and Sunday.
Interstate 90
I-90 between Exit 17 (U.S. 85 south) and Whitewood, Exit 23, is down to one lane with a 65 mph speed limit and a 16-foot width limit until further notice for ditch grading, shoulder repair and a box culvert extension, per SD 511.
I-90 from 1 mile west of Piedmont, Exit 44, to just west of Summerset, Exit 48, is one lane in each direction until further notice, with a 65 mph limit that may drop to 45 mph when workers are present and a 16-foot width limit, per SD 511.
Eastbound I-90 at Piedmont will be closed nightly from 9 p.m. to 6 a.m. beginning Tuesday, Nov. 3, through Thursday, Nov. 5, for girder installation on the new Exit 46 overpass. Eastbound traffic will detour at Exit 46 onto Sturgis Road, then Stagestop Road, and back onto I-90 at Exit 48, the South Dakota Department of Transportation said Thursday. For text updates, text I90Exit46 to 605-566-4041.
I-90 near Wall, between Exits 110 and 112, has one lane open, a 45 mph speed limit and a 16-foot width limit until 4 p.m. Friday, Oct. 30, per SD 511.
Rapid City and Pennington County
U.S. Highway 16A in Keystone remains closed at the S.D. Highway 40 intersection while the bridge there is replaced with a box culvert, with a 12-foot width limit and a 50-foot length limit until further notice. SDDOT's project page says a detour is provided.
U.S. Highway 16B westbound, from 3.5 to 1.5 miles east of the U.S. 16 junction in Rapid City, has one lane open with flaggers and a 16-foot width limit until further notice while crews add a turn lane at Dan Christy Lane. The speed limit drops to 45 mph during working hours, per SD 511.
Rapid City streets, from the city's road construction page (end dates are estimates):
- 12th Street is closed between West Omaha and West Rapid streets through Sunday, Nov. 1.
- Old Folsom Road has flaggers during daylight, with both lanes open evenings and overnight, through Friday, Oct. 30.
- Creek Drive is closed to through traffic from Omaha Street to Saint Patrick Street through Friday, Oct. 30.
- East Saint Charles Street is closed from Sioux Avenue to Riley Avenue, and Sioux Avenue from East Saint Patrick to East Franklin Street, through Friday, Oct. 30.
- Corral Drive: starting Monday, Nov. 2, the inside turn lane from Sheridan Lake Road onto Corral Drive and the inside lane on Corral Drive close for water main work, through Friday, Nov. 13.
- Addison Avenue has one lane closed through Monday, Nov. 9.
- South Street is closed from 12th Street to West Boulevard through Friday, Nov. 20.
- The Elm Avenue and Fairmont Boulevard intersection is closed, with work moving to Maple Avenue, through Thursday, Nov. 26.
- Elmhurst Drive is closed to through traffic from Canyon Lake Drive to Minnekahta Drive through Friday, Nov. 27.
- Canyon Lake Drive has one lane closed from Clifton Street to Minnekahta Drive through Monday, Nov. 30.
- Canyon Lake Drive and Sheridan Lake Road sidewalks near Post 320 are closed to pedestrians and bicycles through Tuesday, Dec. 1.
- West Main Street has one eastbound lane closed near Mountain View Road through Friday, Dec. 18.
- The Cherry Avenue and East Saint Charles Street intersection is closed, along with the turn lane from East Saint Joseph Street, through Tuesday, Dec. 22.
Tower Road at 225th Street in Box Elder will lose its southbound right-turn lane, but no date has been set, according to the city's Oct. 22 update.
Spearfish, Deadwood, Lead and Lawrence County
North Avenue in Spearfish, near Old U.S. Highway 14 and the I-90 Exit 10 ramps, is reduced to one lane in each direction with a 35 mph speed limit, no passing and a 16-foot width limit until further notice, per SD 511.
U.S. Highway 14A at Cheyenne Crossing, from the U.S. 85 junction to a half mile east, is one lane under temporary signals for a culvert replacement on Ice Box Creek, with delays of about 10 minutes and a 12-foot width limit until further notice. SD 511 expects two-way traffic back by November 2026.
U.S. Highway 14A west of Deadwood, from 2.25 to 2 miles west of the U.S. 85 North junction, has flaggers, one lane, no passing, delays of about 15 minutes and a 10-foot width limit until further notice for inslope repair, per SD 511.
Hot Springs and Fall River County
U.S. Highway 385 in Hot Springs, 1 to 1.5 miles north of the U.S. 18 West junction, has a lane shift for a city bridge project and no vehicles wider than 12 feet until further notice, per SD 511.
S.D. Highway 79 north of Hot Springs, from the U.S. 18 and U.S. 385 junction east of town to 7.25 miles north, has northbound pavement repair with one lane, no passing and a 16-foot width limit Monday through Saturday from 6 a.m. to 5 p.m. until further notice.
S.D. Highway 471 south of Edgemont, from a quarter mile north of the S.D. 71 junction at Rumford to 1 mile south of the U.S. 18 junction at Edgemont, has construction Monday through Friday from 5 a.m. to 7 p.m. until further notice, per SD 511. The pipe replacement and paving project began in July and is scheduled to be finished Friday, Nov. 6, according to SDDOT.
Later: U.S. 16A in Keystone is scheduled to reopen by April 23, 2027. The $77.7 million Exit 46 reconstruction at Piedmont runs through December 2028.
For live conditions, check sd511.org or dial 511, and for local streets, check with your city or county.
