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Samsara Streamlines California Clean Truck Check Compliance

Samsara's latest integration automates emissions testing and reporting to meet California Air Resources Board Clean Truck Check requirements.

March 13, 2025
Samsara Streamlines California Clean Truck Check Compliance

As part of California's Clean Truck Check, Remote Emissions Monitoring Devices monitor the exhaust emissions of passing heavy-duty vehicles and flag potential high emitters.

Photo: CARB

2 min to read


Samsara has introduced CTC Manager, which automates emissions testing and reporting to meet California Air Resources Board Clean Truck Check requirements.

In January, CARB began enforcing new emissions testing requirements for heavy-duty vehicles to meet California’s Clean Truck Check standards -- essentially smoke-testing.

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Fleets operating in or entering California will need to conduct emissions tests twice annually, with testing intervals increasing to four times per year by 2027. This is separate from California’s Advanced Clean Trucks or NOx Omnibus regulations.

While more frequent testing will help advance the state’s clean air initiatives, Samsara said, it presents logistical and financial challenges for thousands of fleets adjusting their processes to remain compliant.

Samsara has developed CTC Manager as its latest telematics integration to simplify emissions compliance for customers.

How CTC Manager Can Help Fleets Comply with California's Diesel Smoke Rules

With Samsara CTC Manager, trucking fleet operators can remotely collect emissions data and automate their reporting processes.

CTC Manager, which is CARB certified, allows emissions data to be tracked remotely via Samsara Vehicle Gateways and automatically transmitted to CARB for evaluation without the need for an in-person inspection. 

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This will help reduce delays, disruptions, and fines or penalties by keeping vehicles on the road.

The City of Sacramento Public Works reports it has significantly reduced costs and time spent on vehicle testing since it started using CTC Manager. 

“Manually testing vehicles for the CTC would have been costly and time-intensive due to staff hours and equipment needs,” said Fleet Manager Alison Kerstetter. 

“With Samsara Vehicle Gateways already installed on all fleet assets, the decision to implement Samsara CTC Manager was easy. Now, the CTC can be conducted during daily operations.”

In addition, CTC Manager provides clear visibility into the emissions status of every enabled vehicle and centralizes this information within Samsara’s Connected Operations Platform.

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