Iain Stewart and Mark Lancaster performed the opening ceremony of the coachway at M1 junction 14.
Mr Stewart (pictured), MP for Milton Keynes South, said: “It will boost the city’s transport links, which is a massive advantage as we pitch for new businesses to set up base here.”
The new Coachway, one of the busiest coach interchanges in the country, has been funded by the Homes & Communities Agency and Department for Transport.
Mr Lancaster, who represents Milton Keynes North, said: “Milton Keynes is the fastest-growing city in the country. Finally we have a transport facility that matches our stature.”