Time for north-south commuters to pay for the north-south road

Sean Roche is getting annoyed that Turnpike tolls will be going up again to help pay for the Big Dig:

... Higher, peak-priced tolls on the 'Pike would be welcome (with standard caveats about managing the impact on the complex transportation infrastructure).

But, it's insane that I-93 remains a free ride, especially given that technology exists to charge vehicles without erecting a single tollbooth. ...