Seattle, Washington — On July 28, 2022, a welding truck ignited on Interstate 5 near the Mercer Street exit, triggering an explosion that forced a multi‑hour shutdown of the highway.
The incident mattered to truckers because I‑5 serves as a critical artery for freight moving between the Pacific Northwest and the rest of the country. Any interruption can ripple through supply chains, delay OTR truck driver deliveries, and increase deadhead miles for owner‑operators scrambling for alternate routes.
Seattle Fire Department reported that the welding vehicle burned for roughly 30 minutes before the explosion subsided. No injuries were recorded, but the blast damaged the Mercer Street exit sign, which had to be removed. Washington State Department of Transportation spokesperson Tom Pearce explained that the heat caused a “concrete kind of burn” and loosened a layer of pavement. Crews applied a temporary asphalt patch and scheduled a permanent repair for a later evening.
What This Means for Drivers
CDL‑A drivers on the West Coast faced immediate detours through surface streets, adding 15 to 20 minutes to typical travel times. Owner‑operators hauling time‑sensitive loads had to recalculate fuel budgets because the detour increased mileage by an estimated 8‑10 percent. Fleet managers were forced to reroute trucks in real time, monitor traffic apps, and communicate new ETAs to shippers, all while keeping compliance with FMCSA regulations on driver hours. The temporary pavement repair also meant that heavy tractor‑trailer traffic could experience uneven surface conditions, requiring reduced speeds to avoid damage to tires and suspension.
Industry Reaction
While the source did not cite specific carrier statements, the broader trucking community treats such incidents as a reminder to diversify routing options and maintain up‑to‑date GPS data. Trade groups have urged state agencies to expedite permanent fixes on major corridors, noting that repeated closures can erode confidence in the reliability of interstate infrastructure. Carriers continue to prioritize safety protocols for on‑site welding and other hot‑work activities, recognizing that a single spark can halt an entire freight corridor.
Key Points
- Explosion occurred July 28, 2022, on I‑5 near Mercer Street.
- Fire lasted about 30 minutes; no injuries reported.
- Damaged exit sign removed; temporary asphalt patch applied.
- WSDOT plans a permanent repair during a scheduled evening closure.
Looking for a better trucking job? US Trucker's free job‑matching service connects CDL‑A drivers, OTR truck driver, regional drivers, and owner‑operators with 500+ top US carriers. Leave your details in the form on this page and a recruiter will call you within one business day. Trucking companies are hiring now.