I presume the issue on the north-south streets of the Hoddle grid is the
half-blocks of the "Little"streets. However, they're about 100 metres which
is room for even a CSELR type platform. The Bridge St stop in Sydney is in
a block that's little more than the length of the platform. There would be
little issue for a 45 metre or even 60 metre platform in Melbourne.

Tony P