The British Parliament passed the Railway Regulation (Gauge) Act in 1846 to establish uniform standards for railway track gauges across the United Kingdom.
The Pennsylvania Railroad built the Sawtooth Bridges, a pair of railroad bridges on the Northeast Corridor in the Meadowlands in Kearny, New Jersey, in the early 20th century.
The first sleeper cars appeared on American railroads in the 1830s and could be configured for coach seating during the day. Some of the more luxurious types have private rooms.
