1 70:01:02:04. Beadle County. The following are the maximum speeds on certain highways
in Beadle County:
(1) U.S. Highway 14 beginning in Wolsey at Mile Reference Marker 330.051 0.2 miles
south of the junction of U.S. Highway 14 and Section Line Road then south for 0.18 0.2 mile, 45
forty-five miles per hour; then south for 0.769 0.8 mile, 35 thirty-five miles per hour; then south
for 0.18 0.5 mile, 45 forty-five miles per hour;
(2) U.S. Highway 14 beginning 0.32 0.3 mile west of the east city limits of Cavour, then
east for 0.36 0.4 mile, 45 forty-five miles per hour;
(3) U.S. Highway 14 beginning at the northwest corner of section 6, township 111 north,
range 65 west of the fifth principal meridian 0.4 mile east of mile reference marker 316 in
Wessington, then east for 1,800 feet, 45 forty-five miles per hour;
(4) U.S. Highway 14 beginning 2.76 2.8 miles west of the junction of U.S. Highway 14 and
State Trunk Highway 37 in Huron, then east for 1.73 1.7 miles, 55 fifty-five miles per hour; then
east for 2.24 2.2 miles, 45 forty-five miles per hour; then east 1.0 for one mile, 55 fifty-five miles
per hour;
(5) State Trunk Highway 28 beginning 0.75 0.8 mile west of the junction of State Trunk
Highway 28 and Spink County Road 13, then east for 0.81 0.8 mile, 40 forty miles per hour;
(6) State Trunk Highway 37 beginning 2.05 two miles north of the junction of U.S. Highway
14 and State Trunk Highway 37 in Huron, then south for 0.85 0.9 mile, 55 fifty-five miles per
hour; then south for 0.66 0.7 mile, 35 thirty-five miles per hour; then south for 1.83 1.8 miles, 30
thirty miles per hour; then south for 0.81 0.8 mile, 35 thirty-five miles per hour; then south for
0.53 0.8 mile, 45 forty-five miles per hour; then south for 0.20 0.2 mile, 55 fifty-five miles per
hour; then south to the Sanborn County Beadle-Sanborn county line, 70 seventy miles per hour.
2 Source: SL 1975, ch 16, § 1; 6 SDR 109, effective May 29, 1980; 7 SDR 25, effective
September 22, 1980; 13 SDR 77, effective December 28, 1986; 13 SDR 116, effective March 1,
1987; 13 SDR 129, 13 SDR 134, effective July 1, 1987; 22 SDR 165, effective June 2, 1996; 26
SDR 161, effective June 11, 2000; 32 SDR 53, effective October 10, 2005; 36 SDR 27, effective
August 23, 2009.
General Authority: SDCL 32-25-7, 32-25-7.1.
Law Implemented: SDCL 32-25-7; 32-25-7.1.
3 70:01:02:09. Lawrence County. The following are the maximum speeds on certain
highways in Lawrence County:
(1) State Trunk Highway 34 beginning at the west platted limits of St. Onge Township, then
southeasterly for 0.4 mile to the south platted limits, 40 forty miles per hour;
(2) U.S. Highway 14A beginning at the junction with East Colorado Boulevard just east of
the east in Spearfish city limits, then southerly for approximately 19 18.5 miles to the junction
with U.S. Highway 85 at Cheyenne Crossing, 35 thirty-five miles per hour;
(3) U.S. Highway 14A beginning at the junction with U.S. Highway 85 at the north edge of
Deadwood, then easterly for 0.09 0.1 mile, 35 thirty-five miles per hour; then easterly for 0.45 0.5
mile, 50 fifty miles per hour; then easterly for 6.16 5.8 miles, 55 fifty-five miles per hour; then
easterly for 2.09 2.1 miles to the Meade County Line Lawrence-Meade county line, 45 forty-five
miles per hour;
(4) U.S. Highway 85 beginning at the junction with U.S. Highway 14A near the north city
limits of Deadwood, then northerly for 1.19 1.2 mile, 45 forty-five miles per hour; then northerly
for 2.71 2.7 miles, 55 fifty-five miles per hour;
(5) State Trunk Highway 34 beginning 0.4 mile north of the centerline of Interstate Highway
90 at Exit 23, then southerly for 0.15 0.1 mile, 45 forty-five miles per hour; then southerly for 0.37
0.3 mile, 30 thirty miles per hour;
(6) U.S. Highway 14A beginning at the junction of U.S. Highway 85 at Cheyenne Crossing,
then northeast for 0.2 mile, forty-five miles per hour; then northeast for 4.3 4.1 miles, 55 fifty-five
miles per hour; then northeast for 2.91 2.9 miles, 40 forty miles per hour; then northeast for 0.49
0.5 mile to the junction of U.S. Highway 85 in Lead, 25 twenty-five miles per hour;
4 (7) U.S. Highway 85 beginning at the west city limits of Lead, then east for 0.8 mile, 25
twenty-five miles per hour; then easterly for 0.5 mile, 20 twenty miles per hour; then easterly for
0.8 mile, 25 twenty-five miles per hour; then easterly to the junction with U.S. Highway 385,
Pluma junction, 35 thirty-five miles per hour;
(8) U.S. Highway 385 beginning at the junction with U.S. Highway 85 in Deadwood, then
southeasterly 1.0 one mile, 35 thirty-five miles per hour; then southeasterly 3.82 miles, 55 fifty-
five miles per hour; then southeasterly 2.05 two miles, 45 forty-five miles per hour; then
southeasterly 12.92 12.9 miles to the Pennington County Lawrence-Pennington county line, 55
fifty-five miles per hour;
(9) U.S. Highway 85 beginning at the junction of U.S. Highway 385 in the City of
Deadwood, then northeasterly for 1.04 1.1 miles, 25 twenty-five miles per hour; then northeasterly
for 0.8 0.7 mile to the intersection of U.S. Highway 14A, 20 twenty miles per hour;
(10) U.S. Highway 85 beginning at the Wyoming state line, then northeasterly for 6.91 6.9
miles, 55 fifty-five miles per hour; then northeasterly for 9.38 9.1 miles, fifty miles per hour; then
northeasterly for 0.2 mile to the junction with U.S. Highway 14A at Cheyenne Crossing, 50 forty-
five miles per hour;
(11) U.S. Highway 14A beginning at the junction with U.S. Highway 85 in Lead, then north
for 0.36 0.3 mile, 25 twenty-five miles per hour; then northeasterly for 0.24 0.3 mile, 35 thirty-
five miles per hour; then northeasterly for 3.13 3.1 miles, 45 forty-five miles per hour; then
northeasterly for 0.68 0.7 mile to the junction of Main Street, 25 twenty-five miles per hour; then
northeasterly for 0.79 0.8 mile to the junction of U.S. Highway 85 at the north edge of Deadwood,
35 thirty-five miles per hour;
5 (12) Truck speed for eastbound trucks with dual tires on the driver axle on U.S. Highways
85 and 14A beginning at a point 4.3 miles east of the junction of these two highways at Cheyenne
Crossing, then east for a distance of 2.32 miles to the Terry Peak Road, 35 miles per hour;
(13) Truck speed for northbound trucks with dual tires on the driver axle on U.S. Highway
385 beginning at a point 3.5 miles south of the junction with U.S. Highway 85 in Pluma, then north
for a distance of 2.5 miles, 25 twenty-five miles per hour;
(14)(13) U.S. Highway 14A beginning at the junction of East Colorado Street and Spearfish
Canyon Road on the east side of Boulevard in Spearfish, then east for 1.57 1.6 miles to the south
ramp terminals of Interstate 90 at Exit 14, 45 forty-five miles per hour;
(15) U.S. Highway 14 eastbound loop beginning at the south end of the bridge over
Interstate 90 at Exit 10, then south for 0.92 0.5 mile, 45 miles per hour; and U.S. Highway 14
westbound loop beginning 0.92 0.5 mile south of the south end of the bridge over Interstate 90 at
Exit 10, then north for 0.92 0.5 mile, 45 miles per hour;
(16)(14) Northbound U.S. Highway 85 N beginning at the south end of the bridge over
Interstate 90 at Exit 10, then north for 0.5 mile, 45 forty-five miles per hour; and southbound U.S.
Highway 85 S beginning 0.5 mile north of the south end of the bridge over Interstate 90 at Exit
10, then south for 0.5 mile, 45 forty-five miles per hour;
(17)(15) State Highway Maintenance Route 473 beginning at the junction of U.S. Highway
14A/85 14A and U.S. Highway 85 southwest of Lead, then westerly for 1.58 1.6 miles, 40 forty
miles per hour; then westerly for 1.55 1.6 miles, 30 thirty miles per hour.
Source: SL 1975, ch 16, § 1; 6 SDR 85, effective February 24, 1980; 9 SDR 7, effective
July 27, 1982; 11 SDR 22, effective August 12, 1984; portion of subdivision (3) transferred to
subdivision 70:01:02:49(10), 13 SDR 129, 13 SDR 134, effective July 1, 1987; 14 SDR 111,
6 effective February 28, 1988; 15 SDR 158, effective April 26, 1989; 17 SDR 127, effective March
3, 1991; 17 SDR 151, effective April 8, 1991; 19 SDR 30, effective August 30, 1992; 21 SDR 97,
effective November 27, 1994; 21 SDR 171, effective April 2, 1995; 22 SDR 165, effective June
2, 1996; 22 SDR 183, effective June 30, 1996 ; 23 SDR 132, effective February 27, 1997; 26 SDR
124, effective April 2, 2000; 31 SDR 62, effective November 7, 2004; 34 SDR 279, effective May
8, 2008; 37 SDR 58, effective September 27, 2010; 44 SDR 95, effective December 5, 2017; 44
SDR 184, effective June 25, 2018; 45 SDR 9, effective July 30, 2018.
General Authority: SDCL 32-25-7.
Law Implemented: SDCL 32-25-7.
7 70:01:02:27. Fall River County. The following are the maximum speeds on certain
highways in Fall River County:
(1) U.S. Highway 18 beginning at the junction with U.S. Highway 385 in Hot Springs, then
westerly for 0.4 mile, thirty-five miles per hour; then westerly for 0.5 mile, forty-five miles per
hour; then westerly for 0.6 0.7 mile, fifty miles per hour; then westerly for 0.2 0.3 mile to the
junction with University Avenue, forty miles per hour;
(2) State Trunk Highway 71 beginning at the Nebraska state line, then north for 1.11 1.2
miles, fifty-five miles per hour; then northerly for 0.9 mile, forty miles per hour; then northeasterly
for 32.8 miles to 0.4 mile south of the intersection with U.S. Highway 18, fifty-five miles per hour;
then northeasterly for 0.34 0.4 mile to the intersection of U.S. Highway 18, forty-five miles per
hour;
(3) State Trunk Highway 471 beginning at its intersection with State Trunk Highway 71,
then northwesterly for 13.24 13.2 miles, fifty-five miles per hour; then northwesterly for 0.59 0.6
mile, thirty-five miles per hour; then northerly for 6.48 6.5 miles, fifty-five miles per hour; then
northerly for 0.63 0.6 mile, thirty-five miles per hour; then northerly to the intersection with U.S.
Highway 18, twenty-five miles per hour;
(4) U.S. Highway 18 beginning 3.0 2.9 miles west of the junction with University Avenue
at the west edge of Hot Springs, then east for 2.8 2.7 miles, fifty-five miles per hour; then east for
0.2 mile, thirty-five miles per hour;
(5) U.S. Highway 18 beginning at the junction with State Trunk Highway 79, then westerly
for 1.68 1.7 miles, fifty-five miles per hour; then westerly for 2.11 2.2 miles, fifty miles per hour;
then westerly to the junction with U.S. Highway 385, thirty-five miles per hour;
8 (6) U.S. Highway 385 beginning at the junction with U.S. Highway 18 in Hot Springs, then
northerly for 2.13 2.1 miles, twenty-five miles per hour; then northerly for 0.47 0.5 mile, thirty-
five miles per hour; then northerly for 0.19 0.2 mile, forty-five miles per hour;
(7) U.S. Highway 385 beginning at the Nebraska border, then north to a point 0.69 0.7 mile
south of the junction with U.S. Highway 18, seventy miles per hour for those segments of highway
that are four-lane divided sections; then north to the junction with U.S. Highway 18, fifty-five
miles per hour;
(8) U.S. Highway 18 beginning at the junction with U.S. Highway 385 near Oelrichs, then
westerly for 0.15 0.3 mile, fifty-five miles per hour; then westerly to a point 0.26 0.6 mile south
of the intersection with State Trunk Highway 79, seventy miles per hour for those segments of
highway that are four-lane divided sections; then north to the junction with State Trunk Highway
79, fifty-five miles per hour;
(9) State Trunk Highway 79 beginning at the junction with U.S. Highway 18, then north for
0.35 0.6 mile, fifty-five miles per hour; then north to the Custer County line, seventy miles per
hour for those segments of highway that are four-lane divided sections;
(10) U.S. Highway 18 beginning 0.60 0.7 mile west of the junction with State Trunk
Highway 471, then east 0.74 0.8 mile, fifty-five miles per hour;
(11) U.S. Highway 18P beginning at its west junction with U.S. Highway 18, then easterly
to the west junction with State Trunk Highway 471 in Edgemont, twenty-five miles per hour; and
(12) U.S. Highway 18P beginning at its east junction with U.S. Highway 18, then westerly
for 0.4 mile, forty-five miles per hour, then westerly to the east junction with State Trunk Highway
471 in Edgemont, twenty-five miles per hour.
9 Source: SL 1975, ch 16, § 1; 6 SDR 5, effective July 30, 1979; 6 SDR 109, effective May
29, 1980; 11 SDR 112, effective February 25, 1985; 12 SDR 7, effective July 28, 1985; 12 SDR
138, effective February 23, 1986; 13 SDR 9, effective August 3, 1986; 13 SDR 129, 13 SDR 134,
effective July 1, 1987; 14 SDR 111, effective February 28, 1988; 16 SDR 102, effective December
20, 1989; 22 SDR 165, effective June 2, 1996; 23 SDR 132, effective February 27, 1997; 24 SDR
165, effective May 31, 1998; 25 SDR 108, effective March 1, 1999; 32 SDR 109, effective
December 26, 2005; 44 SDR 95, effective December 5, 2017; 48 SDR 39, effective October 3,
2021; 50 SDR 42, effective October 11, 2023.
General Authority: SDCL 32-25-7, 32-25-7.1.
Law Implemented: SDCL 32-25-7, 32-25-7.1.
10 70:01:02:32. Hamlin County. The following are the maximum speeds on certain highways
in Hamlin County:
(1) State Trunk Highway 28 beginning 0.2 mile west of State Trunk Highway 21, then east
0.8 mile, forty-five miles per hour; then east 1.54 miles, fifty-five miles per hour;
(2) State Trunk Highway 28 beginning 0.22 mile west of the southeast corner of section 24,
township 113 north, range 51 west of the fifth principal meridian, then west for 0.3 mile, forty-
five miles per hour; then west for 0.57 mile, thirty-five miles per hour; then west for 0.2 mile,
forty-five miles per hour;
(3) State Trunk Highway 28 beginning 0.35 mile west of the junction with South Broadway
Street in Bryant, then east 0.2 mile, forty-five miles per hour; then east 0.83 mile, thirty-five miles
per hour; then east 0.2 mile, forty-five miles per hour;
(4) U.S. Highway 81 beginning at the Hamlin and Brookings county line, then north for
1.25 miles, forty miles per hour;
(5) State Trunk Highway 21 beginning at the junction of State Trunk Highway 21 and State
Trunk Highway 28, then north 5.0 five miles to a point one thousand five hundred feet south of
Main Avenue in Hayti, fifty-five miles per hour; then north one thousand feet, forty-five miles per
hour; then north to Main Avenue, twenty-five miles per hour; then east to Fourth Street, twenty-
five miles per hour; then north to Redbird Avenue, twenty-five miles per hour; then east nine
hundred feet one thousand six hundred feet, twenty-five miles per hour; then east one thousand
feet, forty-five miles per hour;
(6) State Trunk Highway 28 beginning 2.6 miles east of the junction of U.S. Highway 81,
then east for 1.6 miles, fifty-five miles per hour;
11 (7) State Trunk Highway 22 beginning 0.38 mile west of the junction of State Trunk
Highway 22 and County Road "C", then east for 0.59 mile, fifty-five miles per hour; and
(8) State Trunk Highway 22 beginning 0.1 mile west of the junction with 450th Avenue,
then east through Thomas for 0.47 mile, fifty-five miles per hour.
Source: SL 1975, ch 16, § 1; 4 SDR 26, effective October 31, 1977; 6 SDR 109, effective
May 29, 1980; 7 SDR 25, effective September 22, 1980; 7 SDR 117, effective June 21, 1981; 11
SDR 73, effective November 29, 1984; 13 SDR 129, 13 SDR 134, effective July 1, 1987; 20 SDR
45, effective October 4, 1993; 22 SDR 165, effective June 2, 1996; 24 SDR 56, effective November
3, 1997; 28 SDR 24, effective August 29, 2001; 28 SDR 181, effective July 4, 2002; 33 SDR 63,
effective October 18, 2006; 38 SDR 8, effective August 3, 2011; 38 SDR 58, effective October 18,
2011; 44 SDR 184, effective June 25, 2018; 46 SDR 64, effective November 25, 2019; 51 SDR
52, effective November 11, 2024.
General Authority: SDCL 32-25-7.
Law Implemented: SDCL 32-25-7.
12 70:01:02:34. Hanson County. The following are the maximum speeds on certain highways
in Hanson County:
(1) State Trunk Highway 262 beginning 0.2 mile northwesterly of Hanson County Highway
8, then southeasterly 0.2 mile, 45 forty-five miles per hour; then southeasterly 0.75 mile through
Emery, 30 thirty miles per hour; then southeasterly for 0.2 mile, 45 forty-five miles per hour;
(2) State Trunk Frontage Road 38EF 38P beginning at State Trunk Highway 38 1 one mile
east of the west Hanson County line, then south, ending at the south ramps of the Interstate
Highway 90 and Riverside Road interchange, 50 fifty miles per hour;
(3) State Trunk Highway 262 beginning at the intersection with the south ramps on the north
side of Interstate Highway 90, then south to Tenth Street in Alexandria, 45 forty-five miles per
hour; then south and southeasterly to Walnut Street, 30 thirty miles per hour; then southeasterly
0.2 mile, 45 forty-five miles per hour.
Source: SL 1975, ch 16, § 1; 4 SDR 20, effective October 3, 1977; 13 SDR 129, 13 SDR
134, effective July 1, 1987.
General Authority: SDCL 32-25-7.
Law Implemented: SDCL 32-25-7.
13 70:01:02:41. Jones County. The following are the maximum speeds on certain highways
in Jones County:
(1) State Trunk Highway 248 and Interstate Highway 90 Business Loop beginning 0.2 mile
east of the section line common to sections 12 and 7, township 2 south, range 28 east of the Black
Hills meridian Kennedy Avenue in Murdo, then west for 0.9 mile, 35 thirty-five miles per hour;
then west for 0.15 0.2 mile, 40 forty miles per hour, then west to Jones-Jackson county line, fifty-
five miles per hour;
(2) U.S. Highway 83 and Interstate Highway 90 Business Loop beginning at its junction
with State Trunk Highway 248 in Murdo, then south for 0.4 mile, 35 thirty-five miles per hour,
then south for 0.2 mile, forty-five miles per hour;
(3) State Trunk Highway 248 beginning at the Jones-Jackson county line, then east to 0.2
mile east of the section line common to sections 12 and 7, township 2 south, range 28 east of the
Black Hills meridian in Murdo, 55 miles per hour;
(4) State Trunk Highway 248 beginning 0.2 mile east of the section line common to sections
12 and 7, township 2 south, range 28 east of the Black Hills meridian Kennedy Avenue in Murdo,
then east to 0.15 mile east of the section line common to sections 32 and 33, township 1 south,
range 30 east of the Black Hills meridian 279th Avenue, 55 fifty-five miles per hour, then east for
0.5 mile, 45 forty-five miles per hour; then east to the Jones-Lyman county line, 55 fifty-five miles
per hour.
Source: SL 1975, ch 16, § 1; 3 SDR 75, effective May 1, 1977; 7 SDR 25, effective
September 22, 1980; 10 SDR 93, effective March 5, 1984; 13 SDR 129, 13 SDR 134, effective
July 1, 1987; 22 SDR 165, effective June 2, 1996; 39 SDR 32, effective September 4, 2012.
General Authority: SDCL 32-25-7.
14 Law Implemented: SDCL 32-25-7.