Measures that can help prevent rockfalls

MY wife and I were among the hundreds of motorists caught in the massive traffic jam along the New Klang Valley Expressway (NKVE) as a result of the Bukit Lanjan rockfall on Nov 26. 

No early warnings, like overhead electronic messages, were flashed at entry-point toll plazas (in my case, at the Rawang toll plaza). Neither were PLUS traffic police teams posted at entry points to NKVE to direct motorists to alternative routes to Petaling Jaya or Kuala Lumpur.