One standard audio recording handbook describes speed regulators, or governors, as being part of a wave of improvement introduced rapidly after 1897.
2.
A built-in speed regulator, which usually prevents an operator from going 15 mph over the speed limit, had been disabled for the purpose of the test.
3.
:I'm actually very surprised that there are busses that can make it up to 100mph-and even more surprised that they don't have speed regulators on them.