identified by a number that refers to the bus route and a destination on its front sign. Also a "BRS" number that indicates which bus points the bus stops at. Due to the enormous number of buses running in Rio, the bus points are classified by a BRS number (from 1 to 6) and different buses stop at different bus points with the same BRS number. Argentina Buenos Aires: Colectivo Bus has 123 routes in service 24/7 with a night frequency of at least 30 minutes or max 60 minute just a few routes. In popular culture London night buses were the inspiration for the Knight Bus found in J. K. Rowling's Harry Potter book and film series (which is a pun on night bus). The Chicago Surface Lines owl service was mentioned in a number of poems by Carl Sandburg: "Old Woman" (1916): "The owl-car clatters along, dogged by the echo..." "Blue Island Intersection" (1922): "The owl car blutters along in a sleep-walk." "Nights Nothings Again" (1922): "A taxi whizzes by, an owl car clutters, passengers yawn reading street signs..." In act II, scene 2 of the Tennessee Williams play A Streetcar Named Desire (1947), Mitch tells Blanche how he'll get home: "I'll walk over to Bourbon and catch an owl-car." The 1997 Swedish film Nattbuss 807 depicts an incident in a night bus. A 2007 Italian noir-comedy film directed by Davide Marengo was entitled Night Bus. The Randy Travis song "Three Wooden Crosses" depicts a night bus travel. References External links Map of the Blue Night Network in Toronto, the largest dedicated overnight transport network in North America