(28 Apr 2018, 9:46 am)Jamie M wrote I mean the passes are a centralized system that's run out of the government at pure loss.. there's payouts for the passes to the operators without any direct funding from the holders. I don't see how this can be an issue if, in exchange, it makes the system more efficient. I'm sure lots of people using the dartford crossing don't have internet access, and I'm therefore certain you can phone in to resolve the issue. This would only be metaphorically applied between start of play to 9:30am.

The difference being pure numbers.

The number of people using the Dartford Tunnel over the course of the day will far exceed the number of people using their conc passes before 9.30am. By virtue, overheads at the Dartford Tunnel for administrating the system become a lot more viable. 

Particularly when you take in to account any conc pass holders travelling prior to 9.30am who are going to medical appointments and travel free with an accompanying letter.

Revenue vs costs. 
Are revenues greater than costs? In Dartford Tunnel case, the potential is greater than with the 50p scheme you propose.

If the current conc scheme runs at a pure loss as you suggest, then the 50p scheme only adds to that black hole.