Arizona transportation officials are trying to accelerate several key highway projects.
The state Department of Transportation is applying for a total of $110 million of federal grants to improve Interstate 10 between Phoenix and Tucson, rehabilitate an Interstate 15 bridge in northwestern Arizona and upgrade a highway serving a major border crossing in Nogales.
ADOT plans several steps to improve I-10, including widening two stretches in Pinal County and enhancing technology such as remote sensors that provide early warning of dust storms.
The agency wants to upgrade State Route 189 in Nogales with a raised median and improved ramps connecting with Interstate 19.
The Interstate 15 project involves an 850-foot-long bridge over the Virgin River. ADOT says the bridge was built in 1964 and has never undergone a major rehabilitation.