New Delhi, Oct. 18 -- The Union government is planning a sequel to the Golden Quadrilateral network of national highways, introducing high-speed expressways linking India's major economic centres, two officials said.

New expressways would be developed along the East-West and North-South corridors and the Golden Quadrilateral highway networks in 5-7 years to create a seamless grid connecting major cities, they said.

High-speed expressways are typically access-controlled, ensuring uninterrupted traffic between cities by keeping out slow-moving vehicles and limiting entry and exit points.

The new expressways are meant to offer commuters and freight carriers high-speed alternatives to crowded national highways as well as help reduce the co...