It's an interesting question I suppose, but not sure what it has to do with cycle commuting?
Oddly, it can have impact (ha ha ha ha) on cyclists and their safety.
I recently taught Child One to drive and am now starting to teach Child Two. Both are keen cyclists.
We talk as we pootle about how this or that action affects other road users.
Drivers who tailgate are often unaware until quite late that the vehicle in front has pulled out to pass a cyclist. Also, the tailgating driver may think that the vehicle pulling out is changing lane or preparing to fork or turn right.
As a result, tailgaters can impose extraordinarily close passes on cyclists who are not expecting a vehicle even to be there. When we're out for drives and are chatting about attitudes to cyclists, we see this happen.
Also, tailgaters generally allow themselves little reaction time (by virtue of proximity and limited vision) and therefore sometimes brake or steer (swerve) when another option might be safer and make more sense.
I don't want to sound all holistic about this, but tailgating drivers make the roads a more dangerous place generally and roads that are more dangerous (less safe) are even more so for cyclists.
Carry on.