Definitely not western, reminds of covered bridges in the Northeast US.
ähmm
"USA: The FHWA encourages the preservation of covered bridges with its Covered Bridge Manual.[14] There are bridges in California, for example at Knight's Ferry,[15] North Carolina,[16] Pennsylvania, Georgia, Oregon, New Hampshire, New York, Ohio, Alabama, Tennessee,[17] Illinois, Indiana, Iowa, Maine, Michigan, Missouri, Rhode Island,[18] Vermont, Virginia, and West Virginia"
from here
http://en.wikipedia.org/wiki/Covered_bridgeapart from there always being room for improvement. I find this bridge actually very useful and attractive, plus, I don't know of any other available.
I am not very familiar with lasercut, but I guess the structure can be improved without much effort since there is no mould but a simple vector graphic to steer the machine?
I would regard it as a good starting point at least.
And while You are at it, please consider wooden (and iron) truss bridges, especially useful for ACW railway wargaming...