Light rail could be extended to the Casino de Lac Leamy.
This could be done with diesel LRT (using Bombardier Talent, or Siemens Desiro). If ridership waranted, the line could be electrified at a later date.
Service from South Keys would have every second train travel across the Prince-of-Wales bridge (via Bayview station) next to St.Joseph Blvd in Gatineau, terminating at the Casino.
The Casino is slated to be a major transfer point of the recently announced Gatineau/STO Rapibus project. Further, the Casino has a number of parking garages which are essentially empty from 9 to 5 that would permit park'n'ride for Gatineau based employees that work in Ottawa.
A station at Tache Blvd would easily connect to 14 different STO routes that originate from West Hull and Aylmer. Along with the proposed Kanata extension, this could provide for a 1-transfer service connecting Aylmer and Kanata.
For Ottawa based employees who work on St.Joseph Blvd (such as at Place Vincent Massey) the LRT would provide a very efficient service. The use of the Prince of Wales bridge would significantly reduce bus congestion on Booth Street, Rideau Street, and King Edward Avenue.
This extension would require one additional vehicle, some signal upgrades, and construction of stations. This extension and the Terrasse extension would cost $19M combined, and could be operational in less than 1 year, provided the politicians were all willing.