There are signs all over the airport, there are signs and digital boards on the airports local shuttle showing which stop to get off for the UP Express etc... I

There are signs all over the airport, there are signs and digital boards on the airports local shuttle showing which stop to get off for the UP Express etc... If you goto the airport website (www.torontopearson.com) it is displayed on the front page. The reason it's receiving slow adoption is because of the price. Even after they reduced the fare you can still get a taxi or Uber directly to your door for a little more than the fare price (Uber and Lyft were recently granted permission for pickups directly from the airport). Additionally because of the lumpy nature of air travel and the multiple commuting stops the UP Express can be packed during peak times. The last time I got off a flight from London and took the UP Express downtown there was standing room only and no space in the luggage racks for my bags.