I get what you're saying Adrian, but, there has to be a point at which so few vehicles would be able to pass in a given time period that it would be pointless having a crossing there.E.g. if there was capacity for 100-200 vehicles to pass every hour, and you only got an average of 50 arriving to use the route, then no issues.But take it to an extreme, if the capacity was just 5-10 vehicles, you wouldn't want it open to everyone, because if you have more than 5-10 vehicles joining the queue per hour, you are just going to get an ever increasing tail back.At some point, if the amount of traffic able to pass while the crossing is reduced sufficiently, than the junction will become saturated, and the knock on effects might be such that it would be better to close the crossing.Just thinking aloud really.Also, the longer you have to wait, the more frustrated some ( not all of course) people waiting to use the crossing will be. So I think there is a potential safety difference between what risk people would be preferred to take to avoid a 10 minute wait compared to a 3 minute wait. Having said all that, difficult to predict what would happen in practice. Personally, I'd prefer an increase in the frequency of trains, see what effect the increased closures of the crossing have on all road users, and if it's too disruptive, then implement the crossing closure and see if it's better.
Andrew Jones ● 5d