The Kulai loop is a 90 kilometre loop through Malaysia, with very few traffic lights or interruptions. The road surface is generally good and the traffic usually minimal. Being country roads you do get cars and trucks passing each other, but most drivers in Malaysia are very respectful of cyclists.
The island of Batam, Indonesia offers well paved roads with very little traffic making for a good cycling day trip.
For me, escaping to the remote island for a day is a welcome change from the traffic lights and constant start-stop nature of cycling in Singapore.