Merseyflow(UK) run a sytem over the new Liverpool/Widnes/Runcorn bridge whereby there are no toll booths just cameras.
Every vehicle is logged and you have to pay at a local store or online by Midnight the following day or get fined.
You can get a yearly permit which is a barcode
sticker to put on your windscreen and the cameras pick it up automatically and log each journey too your account where you you top-up your account by payments online.
So yes systems already exist that do not require a hard border and can be installed within months if required.
But nobody tells us WHY?
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