Truckers and drivers crossing between Arizona and California face a year-long bottleneck that has already begun: the Arizona Department of Transportation (ADOT) has started a pavement rehabilitation project on Interstate 10 at Ehrenberg, in La Paz County, narrowing the highway to one lane in each direction between the California–Arizona state line and Dome Rock Road. The first daytime restrictions ran from 6 a.m. to 6 p.m. on Monday, October 26, and ADOT says around-the-clock weekday restrictions will continue, on and off, into late summer 2027.

Source: Arizona Department of Transportation (ADOT)

ADOT's project alert sets the opening schedule precisely. Daytime lane restrictions are scheduled from 6 a.m. to 6 p.m. Monday, October 26 through Thursday, October 29, from 6 a.m. to noon on Friday, October 30, and again from 6 a.m. to 6 p.m. on Monday, November 2. In that stretch, eastbound and westbound I-10 are both reduced to one lane between milepost 0 and milepost 12, the speed limit drops to 55 mph, and a 14-foot vehicle width restriction applies. ADOT tells drivers to proceed through the work zone with caution, slow down, and watch for construction and law enforcement personnel and equipment.

Around the clock on weekdays — until late summer 2027

This is not a one-week job. In its October 21 advisory, ADOT said the pavement project will narrow I-10 to one lane in each direction around the clock on Mondays through Fridays into summer 2027, with guardrail replacement done in the daytime and paving at night. No lane restrictions are scheduled on weekends or holidays, to minimise traffic impacts, according to the I-10 Exit Guide's summary of the ADOT advisory. ADOT's project page confirms construction began in October 2026 and is expected to be completed in late summer 2027.

Source: I-10 Exit Guide / ADOT advisory

What crews are actually doing on this stretch

The work is a full rehabilitation of the surface and its safety hardware, not a patch job. ADOT lists the project elements as milling and replacing the existing pavement with new pavement, extending pipe culverts, replacing guardrail and guardrail end terminals, and replacing signage, pavement markings and other related work. Reporting on the ADOT advisory describes the paving as removing and replacing the top layer of asphalt across the 12-mile stretch, with new signs and drainage improvements also part of the wider job.

Why this stretch matters — especially for truckers

Ehrenberg sits where I-10 crosses the Colorado River at the California line. It is the gateway every Phoenix- and Tucson-bound truck from Southern California passes through, and every Arizona load heading for California ports and warehouses passes back the other way. ADOT itself advises drivers to plan for delays on this corridor, and Tucson reporting on the project notes that a trip west from Tucson toward the Colorado River, California and destinations beyond runs straight through this work zone — so a backup at the state line reaches drivers hundreds of miles away, and any crash or stall inside the single-lane section has no spare lane to absorb it.

The 14-foot width restriction matters most for oversize and wide loads, which will not fit the narrowed lanes as configured, while ordinary freight, RV and car traffic must merge into a single file at 55 mph in both directions. For Punjabi and other South Asian truckers who run the I-10 corridor between California, Phoenix and Tucson — one of the busiest long-haul routes for the diaspora in the Southwest — the practical advice from ADOT is to build extra time into the run, check conditions before rolling, and expect weekday delays at the river crossing for most of the next year.

Background: a border-to-Dome Rock Road rebuild

The project's full name tells its geography: “Interstate 10, California/Arizona Border to Dome Rock Road Pavement Rehabilitation.” Dome Rock Road, at milepost 12, is east of Ehrenberg toward Quartzsite. The corridor carries interstate freight and holiday traffic side by side, and the state is rebuilding the pavement, drainage structures and guardrail in one long programme rather than in separate short closures — which is why the restrictions, though weekday-only, stretch across roughly ten months.

What happens next is a repeating weekly pattern, not a single reopening date. ADOT will post each phase's restrictions on its project page as the work moves along the 12 miles, with the project as a whole finishing in late summer 2027. Until then, the single most important fact for anyone dispatched across the river at Ehrenberg is simple: on weekdays, there is one lane each way, at 55 mph, with a 14-foot width limit — plan the load, the fuel and the hours-of-service clock around it.