Looks like GCLR also has a problem with information flow from experts supporting discounting ideas!

Grass track has been used in a significant proportion of new light rail systems in Europe, including countries such as Spain and Portugal, these countries as well as light rail systems on the Mediterranean Coast and in Israel have climatic conditions basically similar to those in Sydney. Indeed Barcelona's rainfall is 640mm per year, on an average of 55 days per year. Sydney by comparison is 1217mm of rain, on an average of 138 days per year.

It would be interesting to know the source of the "Concerns on feasibility and reasonableness".
There is no doubt that grassed track would be the most appropriate trackform in the vicinity of the Centennial Parklands, Randwick Racecourse, Moore Park and similar CSELR traversed areas. Doubtlessly Centennial Parklands and other associated bodies would be able to provide advice on maintaining grass surfaces in Australian conditions.

Greg