Most municipal express roads are found in the inner districts of Shanghai, including several elevated highways which run directly above surface-level roadways.
These are still considered expressways or controlled-access highways because of the presence of ramps, grade-separated junctions, and the absence of traffic lights.
These are primary express roads that form a major backbone of expressways within the city core.
Of these four, the Inner Ring, North–South, and Yan'an Elevated Roads form a 申 (a Chinese abbreviation for Shanghai) shape.
Shanghai has one bridge-tunnel crossing spanning the Yangtze Delta to the north of the city.