Yes I've been on that crossing too. Abbey Road is only a few blocks from Lord's Cricket Ground, so it's easy to see both the same day.
That white Beetle added to the 'Paul is Dead' rumour of the time. It's number plate - which you can easily see if you have the album on vinyl - is LMW-28-IF.
See, Paul Maccartney would have been 28 years of age IF he was still alive. And LMW was supposed to stand for Linda McCartney Weeps (because he's dead). Add this to the various other supposed clues such as Paul is the only one in bare feet (so he's a corpse), George is the gravedigger, Ringo is dressed as an undertaker, John is supposed to be dressed as a parson, etc etc, blah blah. Read more about the Paul is Dead story here:
http://en.wikipedia.org/wiki/Paul_is_dead
The VW was said to have been owned by John Lennon, but in fact it was owned by a couple who lived in the flats across the road, and its appearance in the famous album cover shot (and its number plate) was pure conincidence. The studio is behind the whitish brick fence just in front of the VW on the left - today it is covered in graffiti. The VW came up for sale in the 1980s, still with its original plates, and was sold for $25,000. The car still exists today - it's part of the VW museum collection at Wolfsburg where it can be seen today.