> In situations where is ambiguous what you should be charged (there’s a number of interesting edge-cases), the system always charges you the lowest possible am

> In situations where is ambiguous what you should be charged (there’s a number of interesting edge-cases), the system always charges you the lowest possible amount. Not always, you can still be charged a Zone 1 fare if you don't use a pink route validator to prove that you went around the outside of Zone 1.