Sarah M. Drobis, P.E.

Principal Associate

Sarah Drobis has over 20 years of experience in the traffic and transportation engineering industry, directing and conducting complex parking and transportation planning studies for a wide variety of public and private projects throughout Southern California.

Sarah has performed numerous traffic impact and parking demand studies, comprehensive mitigation programs, and site access/internal circulation reviews for retail, residential and medical development projects as well as schools, universities and churches throughout California. Her expertise also includes operational analyses, access and circulation planning for various travel modes (vehicular, pedestrian, truck, transit, etc.), transportation master planning, regional travel demand modeling, corridor studies, signal warrant analyses, development of trip generation models and traffic simulation modeling. She has managed numerous parking studies and shared parking demand analyses for various commercial, residential, institutional and mixed-use developments.

She is currently working on traffic and parking studies for The Ford Theatres, NBC Universal, AMPAS Academy Museum of Motion Pictures, Hollywood Central Park, the University of Southern California Health Sciences Campus, The Gardens Casino, Manhattan Village Shopping Center, and Oakwood Secondary School, as well as a large scale traffic congestion improvement program for Los Angeles.

Sarah recently completed the transportation and parking analyses for The Huntington Library Education and Visitors Center, Disney | ABC Studios at the Ranch, the Discovery Science Center, The Citadel Outlets, Valencia Town Center, the University of Southern California Health Sciences Campus, the University of Redlands, Wilshire Boulevard Temple, and Wildwood School. Other projects include studies for Wildflower Green Energy Farm, Hyatt Place, Lexus of Woodland Hills, the Tyrone Light Industrial Development, a renewable energy center in Rialto, and a materials recovery facility and transfer station in Irwindale. In addition, she led the transportation studies for the award winning Memphis Aerotropolis: Airport City Master Plan in Memphis, Tennessee.

Sarah led the study for the Americana at Brand shopping center in Glendale, the Pasadena Conference Center, and Hahamongna Watershed Park Annex projects in Pasadena, the Canyon Hills Residential Project in the City of Los Angeles, and the Madame Tussauds Wax Museum Project in Hollywood, among many others.


20 years


Bachelor of Engineering,
Civil Engineering and Mathematics,
Vanderbilt University


Civil Engineer, State of California


Institute of Transportation Engineers

Women's Transportation Seminar

Urban Land Institute