@@gabemarah9465 oh I just thought the vent just closes in a sequence with the speed but now that I know that it's a little more than just a vent I understand
2002-2004 Orion VII CNG Bus #7805 on The Bx21 (Formerly Bx26) Bus To Westchester Square-East Tremont Avenue and Lane Avenue (Westchester Square-East Tremont Avenue 6Express and 6Local Subway Station) 2002-2004 Orion VII CNG Bus #7805 on The Bx21 (Formerly Bx26) Bus To Mott Haven-East 136TH Street and Lincoln Avenue (3RD Avenue-138TH Street 6Express and 6Local Subway Station)
2002-2004 Orion VII CNG Bus #7805 on The Bx31 (Formerly Bx9) Bus To Woodlawn-East 242ND Street and Katonah Avenue 2002-2004 Orion VII CNG Bus #7805 on The Bx31 (Formerly Bx9) Bus To Westchester Square-East Tremont Avenue and Lane Avenue (Westchester Square-East Tremont Avenue 6Express and 6Local Subway Station)