The Eastern Express Highway, abbreviated to EEH, is a city express highway serving the city of Mumbai. It is one of the busiest and most important roads in the Mumbai Metropolitan Area and is a part of the National Highway 3. It is a north-south artery of Mumbai connecting the city proper to the eastern suburbs and to the metropolitan area of Thane. For most of its course, it is 6 lanes wide (3 lanes in each direction) with over a dozen flyovers/grade separators.