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The Estrella Underpass at Grand Avenue

Published by Aspire Magazine, June 2017
by: John Lange, Stanley Consultants

State Route (SR) 303L is a 40-milelong new freeway in the western and northwestern portions of the greater Phoenix, Ariz., metropolitan area. Originally known as the Estrella Freeway, it opened in 1992 as a two-lane freeway. Growth and future traffic projections have driven the need to expand SR 303L to an ultimate configuration of six lanes in each direction. This growth in the Phoenix metro area has had a significant impact on bridge design and construction methodology. Bridge widening on existing freeways and over busy urban arterials often requires bridge engineers to explore innovative designs to maintain traffic during major bridge construction activities.

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