Start with a confirmed list of VIN / unit numbers that actually need an emissions inspection under Ontario's RGW and registration triggers. Do not mix safety-only units into an emissions route unless that is intentional and scheduled separately.
Each vehicle should be prepared to reach normal operating temperature at its scheduled inspection time, following the manufacturer's operating guidance and the technician's instructions. Do not organize the entire route around which truck has been idling longest in an attempt to influence the result. Preparation does not guarantee a specific opacity outcome.
Ontario uses SAE J1667 snap-acceleration opacity testing for qualifying heavy-duty diesels. The authorized technician performs the procedure with approved equipment.
Group yards geographically to reduce dead-mileage between stops. Confirm arrival windows so units are present and ready. Sequence locations by confirmed availability first, then by geography.
Related guides: GTA 400-series coverage and when heavy diesel needs DriveON emissions. Coordinate through Piotr Service.