Are you really saying that the cars parked inbetween the sidewalk and the middle of the road obscured vision in such a way that you could not see who was walking on the other side of the car?
Please show me where I've written that.
A more reasonable interpretation of what I wrote would be as follows (remembering this is a purely speculative point) - if Adams/Styles are on the pavement/sidewalk moving towards the TSBD front entrance and Shelley/Lovelady are on the same pavement/sidewalk moving towards the railroad yard it would be inconceivable that they would not have some type of interaction. If, as seems to be the case, they were walking down the same street but, more or less, on opposite sides, with cars in between them, the chances of them not noticing each other rise dramatically - there's lots of people running round, they might be deeply engaged in conversation etc.
I am not saying and did not say they would be obscured from each other by a row of cars. That it a really strange interpretation of the point I was making (as far as I'm concerned)