Southbound Loop 101 between U.S. 60 and Loop 202 will be closed from 11 p.m. Friday to 5 a.m. Monday for carpool lane construction.

A section of northbound Loop 101 will be closed in the Chandler and Tempe areas this weekend, the Arizona Department of Transportation said.

A segment of Loop 101 along the Mesa-Tempe border will close Friday night.

Authorities have reopened northbound Loop 101, which was closed after a semi-tractor trailer rolled over earlier today.

PHOENIX - The southbound lanes of the Loop 101 in the Scottsdale area reopened earlier than scheduled.

Drivers on Loop 101 seem to have a need for speed.

Drivers on Loop 101 seem to have a need for speed.

The fear of citations — and the sting of fines — may have slowed drivers during the first full day of photo enforcement along Loop 101 in Scottsdale.

Drivers gunning their engines on Loop 101 in Scottsdale — maybe hoping to get nabbed by the new speed cameras — might be disappointed next week when their written warnings arrive without souvenir pictures.

Drivers gunning their engines on Loop 101 in Scottsdale — maybe hoping to get nabbed by the new speed cameras — might be disappointed next week when their written warnings arrive without souvenir pictures.

The fear of citations — and the sting of fines — may have slowed drivers during the first full day of photo enforcement along Loop 101 in Scottsdale.

Loop 101 is fast becoming a golden highway of high technology and financial services companies with well-paying jobs that stretch from Chandler and Tempe to the Salt River Pima-Maricopa Indian Community and north Scottsdale.

Construction will close two sections of Loop 101 this weekend, making it difficult to get south to north without getting stuck in traffic jams.

The Arizona Department of Public Safety’s stepped-up enforcement on Loop 101 in the East Valley yielded 180 speeding citations during its first week.

Reckless and raging drivers and budget constraints are challenging Arizona Department of Public Safety officers charged with keeping Loop 101 safe through Scottsdale.

Traffic restrictions are planned for northbound Loop 101 between Southern Avenue in Mesa and Loop 202 in Chandler this weekend.

Traffic restrictions are planned for southbound Loop 101 between Southern Avenue in Mesa and Loop 202 in Chandler this weekend.

About eight miles of new carpool lanes on Loop 101 opened Sunday night, several months ahead of schedule.

Northbound traffic on the Loop 101 will be reduced to two lanes between Cactus Road and Raintree Drive from 10 p.m. today through 5 a.m. Monday by the Arizona Department of Transportation, city officials announced.