Arizona State Route 68

State Route 68, also known as SR 68, is an east–west highway in northwestern Arizona running from its western terminus at its junction with State Route 95 in Bullhead City to a grade-separated interchange at U.S. Route 93 northwest of Kingman. The western terminus formerly extended just to the west of its current point to Davis Dam; this became Mohave County Road 68 in 1998.

State Route 68 marker

State Route 68

SR 68 highlighted in red
Route information
Maintained by ADOT
Length27.88 mi[1] (44.87 km)
Existed1941–present
Major junctions
West end SR 95 in Bullhead City
East end Future I-11 / US 93 near Kingman
Location
CountryUnited States
StateArizona
Highway system
  • Arizona State Highway System
← SR 67→ SR 69

Route description
Arizona State Route 68

The primary purpose of this route is to carry traffic to Bullhead City and Laughlin, Nevada. Since September 11, 2001, the highway had also composed part of the mandatory detour for trucks and recreational vehicles traveling between Arizona and Las Vegas, Nevada via US 93, due to the heavy vehicle restrictions over Hoover Dam. The detour was temporary and was removed in 2010, when the new bypass was completed south of the dam .

History

SR 68 was a 2 lane highway and had a high grade going through the Black Mountains. The highway was expanded to 4 lanes in the mid-1990s and now has a smoother ride through the mountains. There are two runaway truck ramps at 6 and 10 miles westwards downhill from Union Pass.[2]

Beginning with 2015 model year vehicles, SAE standard J2807 standardizes the setting of maximum trailer towing capacities. Among many other subtests, it requires an uphill (eastbound) pull on AZ-68 from near the Davis Dam at 550 ft (170 m) elevation at a minimum temperature of 100 °F (38 °C), driving the 11.4 mi (18.3 km) at a minimum of 40 mph (64 km/h) up the 7 percent grade (average 5%) to Union Pass at 3,570 ft (1,090 m) elevation.[3][4][5][6][7]

Junction list

The entire route is in Mohave County.

Locationmi[1]kmDestinationsNotes
Bullhead City0.000.00

 SR 95 to SR 163 west / Bullhead Parkway – Bullhead City, Needles, Laughlin, Las Vegas		Western terminus; Bullhead Pkwy. serves Laughlin/Bullhead International Airport; highway continues as SR 95 south
Golden Valley27.8844.87 US 93 – Kingman, Las VegasInterchange; eastern terminus; former US 466; US 93 exit 67
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References
  1. Arizona Department of Transportation. "2008 ADOT Highway Log" (PDF). Archived from the original (PDF) on December 28, 2010. Retrieved April 18, 2008.
  2. "State Route 68". www.kiewit.com.
  3. "J2807: Performance Requirements for Determining Tow-Vehicle Gross Combination Weight Rating and Trailer Weight Rating". www.sae.org. Society of Automotive Engineers.
  4. Reed, Trevor (16 January 2015). "SAE J2807 Tow Tests - The Standard". Truck Trend. Motor Trend.
  5. Smith, Bruce W. (2015-12-08). "Know Your Pickup's Weight-Carrying Limits". NATDA. Archived from the original on October 6, 2019. Alt URL
  6. Archived at Ghostarchive and the Wayback Machine: How Much Weight Can Trucks Actually Tow?. YouTube.
  7. "SAE J2807 Tow Tests (Overview)". fifthwheelst.com.
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