Roundabout at State Route (SR) - 138 & 106th Street East Project
Roundabout at State Route (SR) - 138 & 106th Street East Project
Caltrans District 7 is proposing safety improvements at SR -138 and 106th Street East between Littlerock and Pearblossom. The project will reduce collisions and improve operations through a two-lane roundabout, a restricted crossing U-turn (RCUT) at Hempel Avenue, and enhanced signage and safety features.
Overview
PROJECT DESCRIPTION
Caltrans District 7 is proposing traffic safety and operational improvements at the intersection of State Route (SR) 138 and 106th Street East, 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 two-lane roundabout at SR-138 and 106th Street East, 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. 
CURRENT INTERSECTION CONDITIONS 
Looking East 
Looking West
PROPOSED IMPROVEMENTS
Roundabout
The proposed improvement would construct a two-lane roundabout at the intersection of LA-138 and 106th Street East to improve traffic flow and reduce conflict points. The project 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.
*The image shown is a conceptual rendering provided for illustrative purposes only.
WHY ROUNDABOUTS?
The video below provides a brief overview of how roundabouts can improve traffic flow and support safer travel for roadway users.
PROJECT COST, FUNDING, & SCHEDULE
| Estimated Cost | $11 Million |
| Funding | State Highway Operation and Protection Program (SHOPP) |
Tentative Schedule
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 "Share Your Thoughts" tab at the top of this page.
PROJECT DEVELOPMENT PROCESS
Caltrans makes every attempt to ensure our documents are accessible. Due to variances between assistive technologies, there may be portions of documents which are not accessible. Where documents cannot be made accessible, we are committed to providing alternative access to the content. Should you need additional assistance, please contact us at (916) 654-2852 or visit https://dot.ca.gov/request-ada-compliant-documents.