SAN FRANCISCO (AP) — Waze's traffic navigation app already shows ads prodding drivers to swing by fast-food joints like Dunkin' Donuts and Taco Bell. On Tuesday, the Google-owned app will start letting drivers purchase coffee and other items from Dunkin' Donuts for pickup along their way. If all goes well with the Dunkin' Donuts test, Waze plans to team up with other merchants so its millions of users can order pizza, reserve parking spaces, fill prescriptions and even buy groceries without having to open another app on their phones. Waze also offers a carpooling feature that pays drivers to pick up passengers headed in the same direction.