December 2002:
"Much of the economic impacts derived from the WRI expansion will be realized in the City of Burlington portion of Study Area, namely the industrial and commercial development nodes along both sides of Highway 403, as well as the impact it would have on future development patterns on Plains Road… According to projections, the Study Area will grow by nearly 21,000 residents over the next 20 years. It is important to note however that these projections were conducted prior to the release of the 2001 Census. Moreover, they do not fully reflect the level of development activity currently being proposed in the area… While population growth is an important consideration for determining the WRI’s need, we strongly believe that residential development in Aldershot and vicinity will occur with or without the Waterdown Road interchange expansion."
http://cms.burlington.ca/Asset987.aspx
November 10 2010:
"After two years in the making, the interchange at Highway 403 and Waterdown Road is officially open. The $10.8-million project, which saw the construction an off-ramp from the westbound 403 to Waterdown Road and an eastbound on-ramp from the Aldershot GO station access road, is intended to ease traffic on nearby routes. The ramps will redirect heavy trucks from Plains Road, improve response times for emergency vehicles and make west Burlington more accessible along the GTA-Niagara trade corridor. Calling it a “proud day for Burlington” Mayor Cam Jackson predicted the project would take more than 1,000 trucks off Plains Road every day while delivering more customers to local businesses. Echoing Jackson, Ward 1 Councillor Rick Craven said the interchange would “open up the area and act as a stimulus to businesses along Plains Road and in west Aldershot."
http://urbantoronto.ca/forum/threads/403-waterdown-road-full-interchange.14797/
GO Electrification for Aldershot said to be coming by 2024, assuming there's no economic or political turbulence between now and then.