11-03-2009, 08:49 PM
For what conditions? The largest ratios I can think of in mainline use are the operation of (modified) US domestic models on metre gauge in Brazil. Those are pretty much at that width limit, but not as tall. For more extreme ratios, there are some cases on smaller gauges. For example, GE U10Bs modified for 2' gauge in South Africa. <!-- m --><a class="postlink" href="http://www.thedieselshop.us/Data%20GE%20U10B.HTML">http://www.thedieselshop.us/Data%20GE%20U10B.HTML</a><!-- m --> 9' wide and 12' high, exceeding both limits.
Fan of late and early Conrail... also 40s-50s PRR, 70s ATSF, BN and SP, 70s-80s eastern CN, pre-merger-era UP, heavy electric operations in general, dieselized narrow gauge, era 3/4 DB and DR, EFVM and Brazilian railroads in general... too many to list!