The Lake Hefner Parkway is a freeway of length 7.46 mi (12.01 km) in northwest Oklahoma City

Oklahoma city

Oklahoma City is the capital and largest city of the U.S. state of Oklahoma.Oklahoma City may also refer to:*Oklahoma City metropolitan area*Downtown Oklahoma City*Uptown Oklahoma City*Oklahoma City bombing*Oklahoma City National Memorial...

 that is part of a major north–south corridor across the western part of the city. It was opened in 1992.http://www.okhighways.com/ok74n.html

Traffic information

This highway experiences heavy congestion during the morning and afternoon rushes. The main points of congestion are approaching the Britton Road exit northbound (afternoon) and the northbound Northwest Expressway exit (most of the time). The southern portion of the freeway carried approximately 100 000 vehicles per day in 2004, while the northern portion carried around 50 000 vehicles per day. From the beginning of the freeway to the Kilpatrick Turnpike EAST exit, the mainline (excluding weaving lanes) is six lanes, whereas four lanes are present from the Kilpatrick exit to the end of the freeway at Portland Ave.

Median barrier system

This freeway experienced a propensity for crossover, head-on collisions in its early years. The Lake Hefner Parkway became the first highway in the nation to have installed Brifen Safety Fences

Cable barrier

Cable barrier, sometimes referred to as guard cable, is a type of roadside or median barrier. It consists of steel wire ropes mounted on weak posts. As is the case with any roadside barrier, its primary purpose is to prevent a vehicle from leaving the traveled way and striking a fixed object or...

, which have worked extremely well in practically eliminating crossover accidents. Four cables are woven through posts periodically placed on the left shoulder of the southbound road, and upon collision, tend to cause the offending vehicle to be guided along the cables to a stop, thus preventing a crossover. Once an incident occurs, damage is done to the cable system, but is generally as simple as replacing the posts, as they are designed to simply be pushed over so they can be run over instead of acting to push back against the vehicle. The cables have worked so well that they have also been installed on I-35 in Norman and I-40 in western Oklahoma City, where crossover accidents have been a common problem.

Exit list

County	Location	Mile	# Exit number An exit number is a number assigned to a road junction, usually an exit from a freeway. It is usually marked on the same sign as the destinations of the exit, as well as a sign in the gore....	Destinations	Notes
east merges onto west south ends
Oklahoma Oklahoma County, Oklahoma Oklahoma County is a county located in the central partof the U.S. state of Oklahoma. The population was 718,633 at the 2010 census. The county seat and principal city is Oklahoma City...	Oklahoma City Oklahoma City, Oklahoma Oklahoma City is the capital and the largest city in the state of Oklahoma. The county seat of Oklahoma County, the city ranks 31st among United States cities in population. The city's population, from the 2010 census, was 579,999, with a metro-area population of 1,252,987 . In 2010, the Oklahoma...			Interstate 44 east – Tulsa Tulsa, Oklahoma Tulsa is the second-largest city in the state of Oklahoma and 46th-largest city in the United States. With a population of 391,906 as of the 2010 census, it is the principal municipality of the Tulsa Metropolitan Area, a region with 937,478 residents in the MSA and 988,454 in the CSA. Tulsa's... , Wichita Wichita, Kansas Wichita is the largest city in the U.S. state of Kansas.As of the 2010 census, the city population was 382,368. Located in south-central Kansas on the Arkansas River, Wichita is the county seat of Sedgwick County and the principal city of the Wichita metropolitan area...
		0.00		State Highway 66 State Highway 66 (Oklahoma) State Highway 66 is a 196-mile state highway in the U.S. state of Oklahoma, beginning at U.S. Highway 81 in El Reno and ending at U.S. Highway 60 near White Oak. The highway was designated in 1985 as a replacement for the decommissioned US-66...  west (N.W. 39th St.) – Bethany Bethany, Oklahoma Bethany is a city in Oklahoma County, Oklahoma, United States, and a part of the Oklahoma City metropolitan area. The population was 20,307 at the 2000 census.-Geography:Bethany is located at .... , Warr Acres Warr Acres, Oklahoma Warr Acres is a city in Oklahoma County, Oklahoma, United States, and a part of the Oklahoma City metropolitan area. It was established after World War II by C.B. Warr, a dynamic businessman, builder, and commercial developer. The population was 9,735 at the 2000 census.-History:The Warr Acres...
		0.55		N.W. 50th St.
		1.14		State Highway 3 State Highway 3 (Oklahoma) State Highway 3, also abbreviated as SH-3 or OK-3, is a highway maintained by the U.S. state of Oklahoma. Traveling diagonally through Oklahoma, from the Panhandle to the far southeastern corner of the state, SH-3 is the longest state highway in the Oklahoma road system, at a total length of...  west (Northwest Expressway)	SH-3 splits northbound and joins southbound
		2.03		N.W. 63rd St.	Southbound only
		3.62		W. Britton Rd.
		4.69		W. Hefner Rd.
		5.69		N.W. 122nd St.
		6.54		Kilpatrick Turnpike east
		6.75		Kilpatrick Turnpike west, Memorial Rd.
Lake Hefner Parkway becomes north (Portland Av.)

Sources

• All mileages listed herein are determined by using the path distance tool (Ctrl-6) in Google Earth and are computed from the midpoint between the overpasses of SH-66
  State Highway 66 (Oklahoma)
  State Highway 66 is a 196-mile state highway in the U.S. state of Oklahoma, beginning at U.S. Highway 81 in El Reno and ending at U.S. Highway 60 near White Oak. The highway was designated in 1985 as a replacement for the decommissioned US-66...
  
  at the south end of the freeway.

External links

• An article concerning the then-new installation of the cable barriers