Harris, were able to have their way and the lower deck eventually proved to save millions of dollars when the Toronto Transit Commission's Bloor–Danforth subway opened in 1966.

For this reason, a separate concrete bridge was built over the Rosedale Valley, just west of Castle Frank station.

The Prince Edward Viaduct resulted in more rapid development of those portions of Toronto lying on the east side of the Don Valley.

Over time, the Prince Edward Viaduct became a magnet for suicide, falling bodies posing risk to the traffic underneath.

With nearly 500 suicides by 2003, the viaduct ranked as the most fatal standing structure in Canada and the second most in North America, after the Golden Gate Bridge in San Francisco.

[10] People who have survived the jump have had severe consequences including paralysis, organ damage, broken bones and lifelong pain.

[8] Designed by architect Dereck Revington and engineers at Halcrow Yolles and completed in 2003, the Luminous Veil consists of over 9,000 steel rods, 12.7 cm (5.0 in) apart and five metres (16 ft) high, stretched to cantilevered girders.

[19] However, a 2017 study with the same lead author found that "over the long term, suicide-by-jumping declined in Toronto after the barrier with no associated increase in suicide by other means".