State Route 58 Truck Climbing Lane

Project Information

Caltrans, in partnership with the Kern Council of Governments (Kern COG), is proposing a project that would improve traffic flow and commuter travel and move freight more efficiently along a section of State Route 58 with a steep grade in Kern County between the city of Tehachapi and the city of Bakersfield. Commercial trucks make up more than one third of the total traffic volume along the State Route 58 interregional corridor. Truck speeds frequently drop 30 miles per hour or more below the posted speed limit in the steeper sections of this corridor. This drop in truck speed results in reduced speeds for all eastbound traffic creating increased congestion and inefficient traffic flow. The State Route 58 Truck Climbing Lane Project proposes to address the most critical section of State Route 58 through the Tehachapi Mountains by constructing a 12-foot-wide eastbound truck climbing lane from approximately 0.8 miles east of the junction with State Route 223 to 0.4 miles west of Hart Flat Road.  

Additional project features include:

  • Restriping of the intersection with Bealville Road to provide an eastbound acceleration lane
  • Removal of the Bena Road at-grade intersection to eliminate conflicts with traffic entering or exiting SR 58
  • Increasing inside and outside shoulder widths
  • Drainage improvements
  • Culvert enhancement to improve wildlife connectivity
  • Guardrail and signage upgrades
  • Addition of rumble strips
  • Relocation of lighting at Bealville Road and State Route 58  

Project Map

58 Truck Climbing lanes map

Environmental Document

The Final Environmental Document for the State Route 58 Truck Climbing Lane Project is now available for public review upon request.

To obtain a copy of the Final Environmental Document:

  • Request by Mail: Caltrans District 9, c/o Jeremy Milos, 500 S. Main Street, Bishop CA 93514
  • Request by Email.

Project Cost


Project Timeline

Project Schedule (Subject to Change):

March 21, 2023: Circulate DED

April 11, 2023: Online Public Meeting

May 2026: Right of Way Certification

May 2026: Ready to List

October 2026: Advertise

February 2027: Begin Construction 

For More Information

Jeremy Milos, Project Manager, 760-874-8633

Michael Lingberg, Public Information Officer, 760, 920-0280

Title VI

For Title VI information, click here: Caltrans Title VI