Crash on SR-57 N/B (Orange Fwy) at Pathfinder Rd, Diamond Bar, California

Friday, August 28, 2026 at 8:00 AM

Injury crash2 vehicles

Reporting agency: CHP Baldwin Park Area
Report number: 9525-2026-04368

From the CHP CCRS, record last updated October 25, 2026. No changes since first published.

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Wait: about 7 to 10 business days
Who can ask: Parties of proper interest under Vehicle Code 20012: drivers, passengers, injured persons, vehicle and property owners, and their attorneys and insurers. There is no public copy.

CHP Baldwin Park Area: phone (626) 517-8500; address 14039 Francisquito Avenue, Baldwin Park, CA 91706; fee $10 per 25 pages; its request page is linked below.

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Where and when

Location: SR-57 N/B (Orange Fwy) at Pathfinder Rd
City, county: Diamond Bar, Los Angeles County
Collision type: Rear End
Motor vehicle involved with: Other Motor Vehicle
Posted speed limit: 55 / 65 mph
Primary collision factor cited: No
Weather: Clear
Light: Daylight
Road surface: No Unusual Conditions
Hit and run: No
People involved: 2
Injured: 1
Killed: 0

Vehicles and people

Damage area not recorded

Unit 1: 2016 Kenworth Truck Tractor- Diesel

Maroon Truck Tractor

Direction of travel: North
Maneuver: Proceeding Straight

Driver, male, 19Restraint: Occupant Lap Shoulder Harness Used. Airbag: Not Required
Not injured

Damage area not recorded

Unit 2: 2016 BMW 528I

Gray Passenger Car Station Wagon Jeep

Direction of travel: North
Maneuver: Proceeding Straight

Driver, female, 21Restraint: Occupant Lap Shoulder Harness Used. Airbag: Air Bag Not Deployed
Possible injury

What the officer recorded

Violation cited: VC 22350 UNSAFE SPEED:PREVAIL CONDas recorded on the report

A contributing factor or charge recorded by an officer is not a finding of fault or a conviction. We show the record as the state released it.

Nearby and recent

224 crashes recorded on SR-57 N/B (Orange Fwy) in Diamond Bar in the last 12 months, 69 with injuries.

Sep 25, 2026, SR-57 NB to EB SR-60 at Pathfinder Rd.3 vehiclesProperty damage only
Sep 25, 2026, SR-57 S/B (Orange Fwy) at SR-60 E/B (Pomona Fwy)2 vehiclesProperty damage only
Sep 24, 2026, 21324 Pathfinder Rd at Private Property1 vehicleProperty damage only
Sep 24, 2026, 21324 Pathfinder Rd at Private Property1 vehicleProperty damage only
Sep 24, 2026, SR-57 N/B (Orange Fwy) at Pathfinder Rd.2 vehicles, 2 injuredInjury crash

All Diamond Bar crashes, August 2026

About this record

Source: CHP CCRS
Updates: Changes the state makes to this record are applied here when the source publishes them
First published here: October 25, 2026
Last updated: October 25, 2026, no changes recorded
What is left out: Names, addresses, plates, and license and insurance numbers are not in the public data and never appear here

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