Electric counting systems (like infra-red and load weighing) have high implementation costs. To lower the implementation costs, it is necessary that new carriages are equipped with sensors that can measure the occupancy level. Implementing this after construction is very expensive and time-consuming.
In the Thameslink Programme, a project that wants to improve passenger experience and train services in Londen, passenger information systems are installed on the trains. On these displays, travelers can see how busy a carriage is. The displays in the trains are directed outwards, so passengers can see where they are and which carriage are full and which not.
Platform design interventions, like the positions of the exits/entrances, placement of seats and canopies and dividing a platform in different parts can improve passenger distribution significantly. This also counts for good and reliable information (through apps, crowdsourcing, train guards, etc.) for the passenger in trains and at platforms.