Just across the causeway...
Our first MRT will be ready by end 2016 (first section), when Singapore had their first in 1987, about 29 years ahead of us. We have been busy building more and more highways in the Klang Valley but Singapore concentrated on efficient public transport system.
Another big issue with the tolled highways is in order to keep the toll rates affordable, the government is compensating the toll concessionaires hundreds of millions every day, and the amount is increasing year by year. Not fair to those taxpayers who do not/ seldom use the tolled roads but having to subsidize others
Separately, Malaysia government is introducing gateless gantry toll system in 2018. Singapore had it 20 years ago, way back in 1988.