Why Not Just Put a Fuel Meter?

From July 17, passengers on Comfort and CityCab taxis will have to pay a 30-cent surcharge per journey.

Singapore's largest taxi group, ComfortDelGro, said this is to help its cabbies cope with increases in diesel costs.

Source: Channelnewsasia

Is 30-cents the right amount?

But why not just put a fuel meter that's pegged to petrol prices? This would save trouble deciding the amount of fuel surcharge in the future. Hey, petrol stations have been doing it since they were petrol stations.

And this is my reply should SMRT decide to increase their fares. Go ahead, peg your fixed fares with a fuel surcharge.