Interstate 390 would connect I 90 exit 8 in North Greenbush NY to VT Route 279 in Bennington VT The road was planned to travel as part of NY State Route 43 and then parallel to NY State Route 43; then parallel to NY State Route 351; then parallel to NY State Route 7 to VT Route 279 The only parts of the extension that have been built are VT Route 279 near Bennington VT and Route 43 between I-90 & US Route 4 in East Greenbush NY.
A more recent option on the plan would have the road travel along existing power easements in North Greenbush NY with the power lines placed below the road, so that existing homes and businesses would be unaffected.
==Interstate 484 ==
The proposed road would Start on I-84 near Milton PA and end on I-80 near Stroudsburg PA. I-484 would run parallel to US Rte 209 while staying west of Delaware water gap park land. This would create a bypass of overcrowded NJ interstates.
==Interstate 591 ==