1978 Orion I 01.501 (Retired by 1998) 891 – Ontario Bus Industries 1989 Orion I 01.502 (Operated by York Region Transit as of mid-2006 ) Retired. A school bus adjusted for mass transit (Laidlaw 90230) was used briefly in the spring of 1999. See also Other agencies merged into York Region Transit and Viva (bus rapid transit): Markham Transit Vaughan Transit Richmond Hill Transit Newmarket Transit York Region Transit Metropolitan / Lake Simcoe Line – provided transit service to the Yonge Street area of Aurora from 1899 to 1930 External links Aurora Transit York Region Transit Aurora Transit roster Transport in Aurora, Ontario Transit agencies in Ontario York Region Transit