PROJECT DESCRIPTION

Caltrans District 7 is proposing traffic safety and operational improvements at the intersection of State Route (SR) 138 and 106th East Street, located between the communities of Littlerock and Pearblossom in Los Angeles County. This project is being developed to address a history of collisions at the intersection, particularly angle collisions involving vehicles entering or crossing SR-138 from 106th East Street. The corridor serves as a key regional route with high traffic volumes, including a significant number of trucks traveling between Interstate 5 and inland destinations such as Barstow, Victorville, and San Bernardino County.

Based on recommendations from the Intersection Safety and Operational Assessment Process (ISOAP), the project proposes to install a hybrid two-lane roundabout at SR-138 and 106th East Street, along with a restricted crossing U-turn (RCUT) at the intersection of SR-138 and Hempel Avenue. Additional improvements may include flashing beacons, signage, and other safety enhancements designed to improve driver awareness and traffic flow. The project area is characterized by a rural setting with a mix of highway and local traffic, where SR-138 transitions from a multi-lane facility to a narrower configuration.

These improvements aim to enhance safety, reduce conflict points, and improve overall traffic operations along this corridor. Caltrans will continue to evaluate project design and share information with the public as the project advances.

PROJECT INITIATION DOCUMENT  PHASE

This project is currently in the Project Initiation Document (PID) phase, where Caltrans District 7 defines the project purpose and need, evaluates alternatives, and develops preliminary scope, cost, and schedule. 

PROJECT LAYOUT

The project layout, as shown in the image, features a hybrid two-lane roundabout at the intersection of SR-138 and 106th East Street to improve traffic flow and reduce conflict points. The design also includes a restricted crossing U-turn (RCUT) at Hempel Avenue, along with channelization, updated striping, and safety enhancements to better manage vehicle movements along the corridor.
 

Current Intersection Conditions 

Looking East 



Looking West

PROPOSED IMPROVEMENTS

Two alternatives are being considered for this project. 

Alternative 1: Roundabout (Preferred)

This option would construct a hybrid two-lane roundabout at the intersection of SR0138 and 106th East Street to improve traffic flow and reduce conflict points.  It would also include a restricted crossing U-turn (RCUT) at the nearby intersection of SR-138 and Hempel Avenue, along with flashing beacons, updated signage, and roadway striping to alert drivers and improve overall safety along the corridor.

Alternative 2: No-build 

This option would maintain the existing stop-controlled intersection with no improvements.  Under this alternative, current traffic operations and collision patterns would remain, and the existing safety concerns would not be addressed. 

YOUR VOICE MATTERS!

Caltrans wants to hear from you! Your feedback will help us understand the needs of the people who use and live near this corridor. 

Click the blue "Continue" button at the bottom of this page or the "Share Your Thoughts" tab at the top of this page.