Spotted...

Most cyclists commuters ride in 2-3 times a week (I've done a thorough research using my colleagues as guinea pigs).
Mondays and Wednesday always seem to be the busiest days.
Thursdays, people go out in the evening and use public transport.
Fridays are usually super quiet, people go out again, have days off etc... less traffic all round. I like Fridays!

But, why does going out in the evening mean not taking your bike? I just don't get it, but then the last time I got public transport to work was probably about six months ago.