I presume the platforms are sloped like that to allow rain water to drain off the platform during wet weather. I know a lot of older stations here in Perth are, or were, built to a similar design, although I think in our case the slight slope was also to allow clearance for narrow gauge rolling stock so it wouldn't foul the side of the platform.
Another factor that hasn't been discussed in this miraculous event was Melbourne's track gauge of 5' 3" (Irish broad gauge) - if you notice in the video the pram falls well between the rails, hence the train just passed right over the pram with the wheels seeming to miss it completely. If the track had been narrower, then the outcome might have been far more tragic.
Another factor that hasn't been discussed in this miraculous event was Melbourne's track gauge of 5' 3" (Irish broad gauge) - if you notice in the video the pram falls well between the rails, hence the train just passed right over the pram with the wheels seeming to miss it completely. If the track had been narrower, then the outcome might have been far more tragic.