Edison sprawls across the Raritan Valley in central New Jersey, crossed by several major highways. The New Jersey Turnpike runs along the east side, and I-287 begins at the Turnpike in Edison and heads northwest toward Piscataway, Somerset and northern New Jersey. US 1 runs north-south through the eastern part of the township past Menlo Park, and NJ 27, the old Lincoln Highway, runs through the western part toward New Brunswick and Rahway. The Garden State Parkway passes just east near Iselin and Woodbridge, and Oak Tree Road is a busy local street through the township's Little India district.
US 1 is the township's main headache, with heavy traffic and stoplight after stoplight through the commercial corridor. The Turnpike and I-287 interchanges back up at rush hour, and breakdowns cluster there and on US 1. Edison is mostly suburban, with residential neighborhoods, office parks and shopping centers, so a mechanic can reach most driveways and lots quickly once off the highways. Jughandles on US 1 and the other state highways mean left turns often start from the right lane, which takes some getting used to.
Newark Liberty International Airport is a short drive north on the Turnpike, and many residents use its long-term lots. NJ Transit trains on the Northeast Corridor stop at Edison, Metuchen and the Metropark station in nearby Iselin, so plenty of commuters ride into New York or Newark and leave the car at the station all day. Those commuter lots fill early on weekdays.
Raritan Center, a huge industrial and office park along the Raritan River, sits on the township's southeast side near the Turnpike, and its warehouses and offices draw heavy truck and commuter traffic.