He was crossing the same road they all walked up to check. That wasn't Pre-planned and that man wasn't involved. You would go away from danger not towards it.
How long did it take him to cross?
According to Horrocks thirty seconds.
Despite having been seen no alarm was raised because it would be appx. forty five minutes before anyone knew a child was missing ... so from his point of view ... RESULT! particularly since the only witness could only describe his clothing but not his features.
When a detective with the amount of experience of this type of crime under his belt that Horrocks has, voices an opinion, I am inclined to accept his opinion.
That is that Jane Tanner saw Madeleine's abduction in progress; Madeleine was carried to a vehicle parked in the near vicinity; she was then driven out of Luz on the nearby exit route and has not been seen from that day to this as far as we know.
She was well on her way before being missed and before the police were called ... all according to plan.