This bridge has square post piers that sit on horizontal bottom supports (concrete or stone on the prototype), and is the first bridge kit with laser-cut wood parts. This type of trestle was found on nearly every railroad in North America. Trestle may be built straight or curved and includes laser-cut piers and bulkheads, Micro-Engineering's Bridge Flex Trak, and pre-cut wood parts. Also includes full-scale templates and curve templates to aid in assembly.