
From their website:
The pic above shows just one of an infinite number of possible layouts because each 140cm x 105cm (55in x 41in) table has a very large variety of track configurations which make it possible to have endless complete layouts.The aim is to create a system of modular tables which can be rearranged to make different Scalextric layouts, and can be transported, stacked, stored and set up fairly easily.
I know that O'Brie in particular will be interested in the actual hardware involved, especially the design of the tables.
Check out their website. where you can find lots more info. Make sure you click all the links:
http://phantomdrum.co.uk/scalexracer/j-trak/index.html