Re: How to fail a driving test
Originally Posted by Judd
It was so they could accommodate two chariots riding along, side by side.
Did you know that this had an effect on the size of the space shuttle rockets?
Two horses side by side create a rut in a road, which is why carriages tend to have a similar wheel span.
Carriagemakers agreed and adopted a standard width to build towards.
When trains were developed, they tended to use the same skilled carriage builders, who were tooled up to follow their usual standard sizes.
This affected the agreed standard gauge for railways.
This affected the size of railway tunnels.
Size of rockets was partly designed to ensure that could be transported on trains, and thus limited to the size of tunnels.