OK, another thought.
I don't think it's you he's avoiding. He's frightened and is in strange territory, I think he's lying very low and you will need to be almost on top of him before he'll break cover.
Try going back now it's dark and quieter, shake the biscuit box, squeak his favourite toy and wear your smelliest t-shirt (really) and walk 10 paces between calls. Then pause, listen, call again and pause again before moving on the next ten paces.
I found Theo this way when I lost him, he didn't announce himself until I was within 5 yards, and then I needed a torch to actually see where he'd dug in, and a blanket to restrain his struggles once I'd got a hold of him!
Oh, and take a friend to work (listen) on both sides of the street - you'll need the moral support too as well as safety in numbers.
I've got a real soft spot for B&Ws and can't bear the thought of him out there when he's so close to being rescued.