low-floor Flexity vehicles. As per Accessibility for Ontarians with Disabilities Act (AODA) guidelines, all surface vehicles and subway trains have been equipped with the on-board Automatic Next Stop Announcement System since February 2008. It operates over speakers indicating the next stop. A digital orange LED destination sign on streetcars and buses as well as the Toronto Rocket subway trains display the name of the upcoming streets/stations as the vehicle progresses on its route. All TTC revenue service vehicles are equipped with external speakers that play automated announcements of the route and destination of vehicle travel. Infrastructure Stations, stops and terminals Most TTC surface routes terminate at loops, side streets, or subway stations. The TTC is one of the few mass transit systems in Canada where many surface routes can be accessed inside a paid-fare zone common to other routes or subway lines. This feature allows boarding via the back doors at terminals, reduces the usage of paper transfers, and the need of operators to check for proof-of-payment. However, if people are caught entering fare-paid terminals illegally from the street, they could be fined $500 for fare evasion. With the exception of , , , , and , all subway stations' off-street terminals are within the fare-paid area. The shelters in the system are installed and maintained under contracts with Astral Media (later became a part of by Bell Media) (with CBS Outdoor since 2006 and previously Viacom Media) and Toronto Transportation Services. Approximately 4,100 shelters are managed by Toronto Transportation. Some shelters are solar powered and include next vehicle arrival displays. There are four versions of shelters found in the city: Kramer Design Associates Ltd/Cantilevered arch roof – newest version being installed Cantilever arch roof canopy – used on the 512 St. Clair streetcar line Contemporary or Barrel vault dome roof – some by Daytech and installed by Viacom/CBS are found mostly in suburbs like Scarborough Barrel vault dome canopy – select stations with streetcar platforms Traditional flat top – older version in the former city of Toronto and variants in Etobicoke High Capacity Traditional – used on 510 Spadina streetcar line Classic shelters – oldest version without advertisements and found mostly in the suburbs outside of Toronto's pre-1998 limits There are ten sets (men and women) of public washrooms located on the TTC system, all at subway stations that are major transfer points, at the ends of subway lines,