The words look blurish because I tried to take it behind a drop of water on the windscreen! haha..
I guess you can only see this sign in Singapore.
Cars leaving Singapore and driving into Malaysia have to make sure they have at least fuel tank 3/4 full. Failure to do so will result in a fine! The sign tells the drivers to detour back to Singapore if you have less than the required 3/4 tank of fuel.
Huh? What's the reason for this? It is to curb people from buying cheaper petrol over at the Malaysia. Cheapest petrol cost SGD1.973/litre in Singapore and MYR1.92/litre in Malaysia, 1 SGD = 2.3 MYR. You know why.... :-)
Do your city have such rules? haha...