Title text:
'They really shouldn't let those small cars drive in traffic. I worry I'm going to kill someone if I hit one! They should have to drive on the sidewalk, safely out of the way.'
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3167/
Reminds me of the lead up to WW1 where Germany and Britain were in a race to see who could crank out the biggest dreadnaughts.