Crash on Emerald Ln at Diamond Crest Ln, Diamond Bar, California

Tuesday, March 24, 2026 at 3:18 PM

Injury crashBicyclist involved2 vehicles

Reporting agency: Los Angeles County Sheriff's Office
Report number: 926-02091-2928-471

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

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Los Angeles County Sheriff's Office: phone (562) 345-4441; address Records and Identification Bureau, 12440 East Imperial Highway, Suite 120, Norwalk, CA 90650; its request page is linked below.

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Where and when

Location: Emerald Ln at Diamond Crest Ln
City, county: Diamond Bar, Los Angeles County
Collision type: Broadside
Motor vehicle involved with: Bicycle
Posted speed limit: 25 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: Unk

Gray Passenger Car Station Wagon Jeep

Direction of travel: South
Maneuver: Proceeding Straight

DriverRestraint: Occupant Unknown
Not injured

Bicycle

Unit 2: Bicycle

Bicycle

Direction of travel: East
Maneuver: Proceeding Straight

Bicyclist, male, under 18Restraint: Motor Bicycle Driver with Helmet
Minor injury

What the officer recorded

Violation cited: 21950(a)as recorded on the report
Unit 1 driver condition: CELL PHONE USE UNKNOWNas recorded on the report
Unit 2 violation cited: VC SECTION VIOLATED - 21460(a) CVCas 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

1 crash recorded on Emerald Ln in Diamond Bar in the last 12 months, 1 with injuries.

Apr 23, 2026, SR-57 N/B (Orange Fwy) at Pathfinder Rd.2 vehiclesProperty damage only
Apr 23, 2026, SR-57 N/B (Orange Fwy) at Pathfinder Rd2 vehicles, 1 injuredInjury crash
Apr 22, 2026, SR-57 N/B (Orange Fwy) at Golden Springs Dr2 vehiclesProperty damage only
Apr 22, 2026, Pathfinder Rd at 57 Fwy SB Off-Ramp2 vehicles, 1 injuredInjury crash
Apr 21, 2026, SR-57 N/B (Orange Fwy) at Pathfinder Rd2 vehiclesProperty damage only

All Diamond Bar crashes, March 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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