Just a part of the 3D printable railroad system "Euroreprap Railroad System"
To learn about the optimal printing setup please take a look at this PDF:
There is a possibility of linking together LEGO tracks and my "ERS" type tracks (free inter-connector track model is available).
No support is needed during printing
Printers with small bed sizes will do fine (for bed areas below 15x15 cm please contact me first to obtain adequate files set on order)
No special tools are needed during assembly
Various "LEGO type" tracks are available freely for download & printing nowadays.. e.g. here: http://www.thingiverse.com/thing:26734
...but they appear more difficult to 3D print successfully than my tracks :)