In the same month that Logan International Airport hiked its parking rates by $1, Governor Deval Patrick is asking for another $2 parking "carbon fee" as part of his transportation overhaul filed this week.

The carbon fee, described on page 137 of Patrick's 141-page bill, would that mean a 20- or 30-minute trip to pick up a relative at Logan could cost $6 in parking alone, not including tunnel tolls, which could rise to as much as $7 if legislators fail to pass Patrick's other proposal to raise the gas tax. Three hours in a Logan garage would cost $18; all-day parking in a garage would run ...

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