Interstate highways have a huge footprint, and can carry huge amounts of traffic. There are many situations where urban areas should be bypassed, and travel speeded up, that don't justify full-blown Interstates.
Why not more bypass highways such as
VT/NY Roads - VT 279/NY 915G, the
Heathcote Bypass, in Scarsdale, NY and other such roads? They can have exit and entrance ramps, to obviate the need for left turns. They can even have center passing lanes for hills. But they take up far less space than four to six lanes of highway, with a wide divider.
It would seem to make sense for many situations. Cities such as Troy, New York could be usefully bypassed on Route 7. Ditto Pittsfield, Mass., on a different Route 7. There is no need to clog these cities with cars bound elsewhere, or slow down travelers looking to go elsewhere.
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