ADOT plans traffic warning upgrades along I-10 in La Paz County

Drivers on I-10 near Ehrenberg and Quartzsite could soon see a new layer of warnings aimed at catching slowdowns, crashes, and weather trouble before traffic stacks up in the desert. Arizona Department of Transportation has put project 2024085 out for bid, with an opening scheduled for June 12, 2026 at 11 a.m.

The project, titled Install DMS and Queue Warning System, is classified by ADOT as a System Enhancement, or safety improvements job. In La Paz County, the work is planned for I-10 from milepost 0.5 to 6.4 near Ehrenberg and from milepost 20.9 to 21.1 near Quartzsite. ADOT also included a stretch of I-8 near Gila Bend in Maricopa County, but the La Paz County segments are the ones most likely to affect daily traffic in the county.

The package calls for new dynamic message signs, closed-circuit television cameras, a queue warning system, warning signs, grading and related improvements. In practical terms, that means ADOT is building a system that can warn motorists when traffic is slowing or stopping ahead, giving truckers, commuters and winter visitors more time to react before a rear-end crash or a long backup develops on a high-speed corridor.

That matters in La Paz County, where ADOT’s corridor study says most roads crossing I-10 serve local traffic in Ehrenberg and Quartzsite. The interstate is also the main desert route for freight and seasonal travel between California, Quartzsite and the Colorado River corridor, so even a short slowdown can ripple quickly through the area. ADOT says its Arizona Travel Information system already gives motorists access to highway cameras, message boards, weather sensors, travel times, rest areas, truck restrictions, border-wait information, crash reports, delays, closures and weather advisories. The new equipment would plug into that network and should make it easier to spot incidents in real time.

The warning-system plan also fits alongside a separate ADOT effort in west Quartzsite. At milepost 17, the West Quartzsite Traffic Interchange and Frontage Road design project is in Stage III, or 60 percent, design, with completion expected in summer 2026. That project includes widening Quartzsite Boulevard, replacing the bridge over I-10, widening and reconstructing ramps and ramp intersections, adding street lighting and building sidewalks.

At a March 4 public meeting on that west Quartzsite project, ADOT said construction, if funded, could begin in early 2028 and run until late 2029, with one lane kept open in each direction on Quartzsite Boulevard and access to nearby businesses prioritized. Together, the interchange redesign and the new queue-warning system point to a broader ADOT push to make this stretch of La Paz County safer and more reliable for everyone who depends on it.