Burying the LRT has nothing to do with Cars (or well maybe it does, but its not the most important thing), and has actually more to do with making the LRT better. At Grade LRTs are simply so much less reliable than grade separated LRTs ever will be. Because the tracks are at grade, they are more prone to interference from external sources, people walking on the tracks, cars stalling in the middle of an intersection, the fact that all of these interferences exist also means that not only is the speed of the trains significantly slower in these median sections, but you can't run ATC and have the trains run at higher frequencies. Signal Priority also isn't perfect, and even in clear conditions, you will have LRTs occasionally stall behind traffic lights. Its also important to note that the Eglinton West extension will be reaching not only the airport - the largest employment center in the region, but a completely grade separated busway to Square One as well, making it likely to be a highly used transit corridor. Simply put, having Eglinton West be in the median of the roadway makes absolutely 0 sense.