To prepay you have to deposit a minimum of £10 with DartCharge - hardly economical if you rarely use the crossing.
If you do use it without prepayment you only have to the end of the following day to pay or else get a £70 fine - a real pain if you are going away for a few days - with DartSave...
For someone like me that doesn't use the crossing on a regular basis this scheme seems ideal. It's not worth my while putting money on a Dart Card and the few days grace for payment means that if I have used the crossing on a trip I can sort out what is owed on my return.
They obviously make...