Kraus Development (525-565 Conestogo Road) | 3-35 fl | Proposed

[danbrotherston]

I doubt the MTO would allow the median to be left open for a tunnel. The highway at Northfield currently is a rural cross section. If it were to ever be upgraded to an urban cross section with an Ontario Tall Wall the centre median will be filled in. Tunnelling would also be far more disruptive to the traffic flow during construction which will cause Massive Outrage across the region.

I do agree here. Mind you, the part under the median could be an open dig with concrete walls and ceiling, for lower cost of that part.

I have no idea what MTO regulations or policies would say about the concrete tunnel being raised above the bottom of the median ditch. Likely some additional work would be required there to avoid a car driving into the median and hitting a concrete wall head-on. But that is admittedly pure speculation.

Generally the bridges just have parapet walls that prevent vehicles from driving off the edge.