Hi
I used to live in Hull and was only discussing the crossing with my mum and dad before Christmas. From what we remember the track crossed Holderness Road near East Hull Baths. It was towards the Craven Street side and was where there is a hotel now. The track bed was where the new road from Hedon Road to Chamberlain Road? was put in. That would put it next to Brazil Street I think, also "Vine Street" crossing rings a bell with me.
I do remember my sister buying a car from a 2nd hand car lot that was next to the crossing gates , circa 1979. It was on the left as you went into town.
Hope that helps,
Ian