It was some 300 yards (270 m) long, running along the northern edge of the site, and the 2 ft (610 mm)-gauge track was constructed from materials obtained from a sand quarry at Leziate, from Canvey Island, and from the Southwold Railway.

The plan was to lengthen the tramway, the trolleybus route and the narrow gauge railway, and to nearly double the site area, at an estimated cost of one million pounds.

A new exhibition hall was to be built devoted to Eastern Coach Works, a major builder of bus and train bodywork in nearby Lowestoft until it closed in 1987.

Twenty vehicles in store at Ellough near Beccles were to be moved to the Carlton Colville site where they could be viewed.

A muddy field was tarmacadammed as the Back Road, and renamed as Herting Street, after the donor who supported these works.

On 12 July 2008 a loop created along the Back Road, linking in with the existing overhead wiring near the museum's entrance, opened, Britain's first trolleybus extension for many decades.

There are four locomotives which operate on the 2 ft (610 mm) gauge East Suffolk Light Railway (ESLR).