Originally Posted by
CliffordK
That is close. 10 MPH, of their speed, or the speed differential?
Perhaps 2 feet plus 1 foot for every 10 MPH of speed differential. ......
No need to estimate a speed differential. It's 1 foot for every 10mph
per their speedometer.
Since they're typically moving at 30mph or so, that's a 3' pass. However it's more at higher speeds, and allows for close passing at small speed differences on busy urban streets, though based on typical bike speeds, the passing cars are likely to be doing 20 at a minimum, so it's still 2'. If we're both crawling along in very heavy traffic, it might be as low as 1' at 10mph, but that's a very rare condition, and when it happens it's not an issues.