N-Trak is an N-scale modular standard for building portable model railroad modules that connect together to make a larger layout. Developed in the early-mid 1970’s by Ben Davis. Modules are 24 inches deep and in increments of 2 foot lengths, with 4 foot being most common. It has a minimum of 3 mainline tracks towards the front edge of the modules that enter and exit the modules at the same location so that one module can connect to the next.

The Atlantic & Pacific N-gineers have been an N-Trak club since about 1990 and have a roster of around 25 modules built by club members over the last many years.