Taken on its own terms, there is much about it that makes sense. The biggest part of the proposal is a $205 million plan to extend express toll lanes on I-95 north as far as Bel Air. The express toll lanes that exist in that area now represent just the first of what was planned to be four phases, and the section Mr. Hogan is proposing to complete is the next logical step. It would probably boost use of the toll lanes generally in that area. A second major feature of the governor’s plan is a $100 million redesign of the troubled I-695/I-70 interchange, which is long overdue. That interchange has been beyond its capacity for years, and it wasn’t designed well in the first place. It tends to confuse drivers who have trouble figuring out what lane they need to be in, which helps create routine backups there. A third element involves adding capacity the top side of the beltway between Parkville and I-70 by converting the inside shoulders to traffic lanes. There are down sides to that approach from a safety point of view — it will make it more difficult for emergency vehicles to get to and clear traffic accidents, for example. The proposal also does nothing for the rest of the beltway, which features a variety of other bottlenecks. But it is doable.