Interstate 10 - History

History

In Tucson, AZ all exits between Prince Road and 22nd Street are being reopened after an extensive, three-year improvement project. I-10 has been being widened from six to eight lanes, and seven bridges and underpasses have been built to deal with congestion. Plans are also under way to widen I-10 from Marana north to the I-8 interchange at Casa Grande from 4 lanes to 6 lanes starting in the later half of 2007 and continuing into 2008 and 2009.

Texas formerly shared the highest speed limit in the nation with Utah's test section of I-15. The speed limit along I-10 from Kerr County to El Paso County was raised by the Texas Legislature to 75 miles per hour (121 km/h) in 1999 and to 80 miles per hour (130 km/h) in 2006. However, the nighttime maximum speed limit remained 65 miles per hour (105 km/h) and the daytime truck speed limit was 70 miles per hour (110 km/h). With 70,000 miles (110,000 km) of highway in Texas the 432-mile (695 km) stretch of Interstate 10, and 89 miles (143 km) of Interstate 20, between Monahans and the I-10 interchange at the cusp of the Jeff Davis Mountains, only a small percentage of roads were affected.

On September 1, 2011, night-time speed limits were eliminated and the statutory maximum speed limit in Texas was increased from 80 to 85 mph, although no 85 mph speed zones have yet been established.

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