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Old 12-07-2017, 10:27 AM   #13
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Join Date: Dec 2008
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Re: $34.50 toll for 10 miles of travel in Northern Virgi8nia

Originally Posted by Arlington View Post
Virginia has had HOV lanes for a long time, and the cat-and-mouse / cops-and-dummies game was well-advanced, even before the first HOT lanes went in on the Beltway (I-495) and I-95 (which feeds into I-395, the original HOV-3 system that works so well)
Thanks. I guess that's a reasonable stopgap until they implement smarter image/video processing.

Originally Posted by Arlington View Post
The problem on I-66 is congestion and its very high costs in both emissions and, more significantly, wasted human time. Maybe a teeny tiny discount for ZEVs is appropriate (I say this as a ZEV owner), but any SOV vehicle that slows everyone else down potentially imposes a lot of extra emissions and wastes a lot of carpoolers' time.

An SOV ZEV might be a 100 MPGe per passenger at highway speeds. An HOVthat gets 30 MPG highway, is getting 60 MPGe/passenger at HOV-2 and 90 MPGe/passenger at HOV-3. On a 10mile trip, that's not such a huge ZEV win compared to letting the lanes get congested.

And apparently the form of extra vehicles at 5:30am that gum things up early (at a cheap or free time) are the problem right now.
MPGe is an imperfect measurement and generally understates the advantage of a ZEV in comparison to an ICE vehicle. Even ignoring that and using your numbers, in your comparison the ZEV still has a better MPG/e per passenger yet gets no discount compared to the 3 passenger ICE receiving a 100% discount.

If we throw away the math, I still think incentivizing ZEV adoption is worth any added congestion, which is this case translates into a higher toll for single occupancy ICE vehicles rather than actual congestion.

(Someone would inevitably argue that this is a subsidization of ZEVs and then we would have get into the societal costs of burning fossil fuels, but let's skip that.)
"You cannot take in a whole Boston street with a single glance of the eye and then lose your interest because you have thus taken the edge off future discovery; on the contrary, every step reveals some portion of a building which you could not see before, some change in your vista, and some suggestion of pleasant variety yet to come, which not only keeps your interest alive but heightens it and persuades you to go on."
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