Sorry but I'm sceptical about the scheme. It adds very little value compared to its own complexity. In particular the timing of the lights is highly volatile in modern cities, and it seems impossible to collect the ground truth as a mapper just by observing them.
Take the 2050 traffic lights in Berlin for example [1], which are controlled in 3 tiers. Each junction works autonomously with predefined programmes for different times of the day and days of the week, even if disconnected. In the next tier, junctions are regionally clustered, so they can sync for better traffic flow. In the third tier, they are connected with two fibre rings to the traffic management centre in the former airport Tempelhof buildings, where their cycles can be completely changed and adapted: to the current traffic flow or accidents, in response to mass events, and e.g. to switch a 'green corridor' for a state visitor. Thus as a mapper with a stop watch, you never know which of these programmes you are currently observing. Tom [1] Ref: VMZ Berlin, 2013 Lukas Schaus wrote on 2015-01-15 12:15:
Hello Everybody, please take some time to read my proposal concerning more detailed modelling of traffic signals and tell me your thoughts. http://wiki.openstreetmap.org/wiki/Proposed_features/Traffic_Signals I will keep track of the discussion page and the Comments section of the proposal. Greetings Lukas Schaus
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