> For example, in London Citymapper will suggest to wait and board front/mid/back This never seems as useful as it should be because I'm missing a reliable way

> For example, in London Citymapper will suggest to wait and board front/mid/back This never seems as useful as it should be because I'm missing a reliable way to know which direction a London Underground train will approach from? There is a red stop light, but many stations have these at both ends of the platform. Is there some signage or other piece of infrastructure that gives it away?