SouthWest Traffic Engineering (SWTE) is an Arizona-based Traffic Engineering firm providing comprehensive Traffic Engineering design services. Founded by Andrew Smigielski, PE, PTOE, PTP and John Willett, PE, PTOE, in 2003, SWTE is comprised of professional engineers holding registrations in Arizona, California, Colorado, Nevada and Utah. Our firm’s exclusive focus on Traffic Engineering design (including Intelligent Transportation Services) affords us the unique opportunity to offer our clients one-pointed, expert service.

Principals John Willett and Andrew Smigielski, with their more than 30 years of combined experience in the Traffic Engineering industry, have promoted the development of sound traffic and transportation engineering solutions in the areas of both design and planning.

SWTE is an Arizona firm whose depth of experience and singular focus ensure unrivaled traffic engineering services  to our clients.