The Adirondack Northway has a southern extension (reference route 910F) from the I-87/I-90 junction to US 20. This extension is a remnant of plans to build the "Southside Route" parallel to the Thruway to I-787 and is known as Fuller Road Alternate in NYSDOT's databases. The sourthern stub with US 20 was modified to include a loop ramp from US 20 eastbound and an interchange was constructged with Crossgates Mall (the mall built the ramp to the mall; the ramp to the Northway was constructed later by the Town of Guilderland).
| Mile | Northbound | Southbound | Notes |
|---|---|---|---|
| Albany County | |||
| Speed Limit 55 | Speed Limit 45 | ||
| 0.0 | To  To  Toll To  Northway |
 Western Avenue |
At-grade intersection Former stub ramp; some evidence of this remains |
| 0.3 | Crossgates Mall Road Prepare to stop in exit lane |
||
| Speed Limit 45 | |||
| 0.9 | Exit 1E East Albany Boston |
||
| 0.9 | Exit 1W South Toll Toll West Toll New York Buffalo |
||
| 0.9 | North Montréal |
To Western Avenue |
|
| Speed Limit 55 | |||
| Albany County | |||