(a) US Route 20. US Route 20 between the US Route 9 and 20 split and the Rensselaer county/Columbia county line.

(b) [Eff. until April 30, 1997, see also subd. (b) below.] Route 7. Route 7 between Eighth Street in the City of Troy and Route 22.

(b) [Eff. April 30, 1997, see also subd. (b) above.] Route 7 (Hoosick Street) and Hoosick Road). Route 7 between Eighth Street and the New York-Vermont state line in the City of Troy and the Towns of Brunswick, Pittstown and Hoosick.

(c) US Route 9 and 20. US Route 9 and 20 between the City of Albany line and the US Route 20 split in the Town of Schodack.

(e) US Route 4. US Route 4 (Mill Street, Vandenburg Avenue and North Greenbush Road) between Route 378 (Burden Avenue) and Route 136 (Williams Road) in the City of Troy and Town of North Greenbush.