What are the consequences of not caring about traffic jams?

I have some main roads in my city which appear glowing red in the traffic view. When zooming into them I also see large numbers of cars and trucks lining up. However, so far I did not notice any direct consequences of this. The citizens in the traffic jams are happy and the buildings they come from or go to appear to work perfectly.

Should I not remedy the bad traffic situation, what problems will I encounter?

Answer

As Dennis noted, service is a huge part of this – all the services in the game only work if transportation is available (of course, power uses power lines, water uses water pipes, so they aren’t affected by road traffic).

This gets worse as the city grows bigger – it’s very easy to have all your service trucks stuck in one traffic jam. Note that the service buildings don’t have a finite range, the way it’s indicated in the UI – that’s just the range where they’re effective. They will happily travel through the whole city, through three different traffic jams to get to a point where they are needed, and then back again. There is a limit to how long they can spend on a trip, but it’s pretty long. Something that looks like a fun traffic jam in a 20k city will completely paralyze a 60k city. Seriously, I’ve had a city drop from 80k to 50k over a few weeks, just because of traffic jams!

Industry can only work if it has the resources. If you’re seeing many abandoned buildings, this is one likely cause. This is much more important when you have e.g. wood industry without a forest – all the wood has to be imported. Industry creates huge traffic in the mid-late game.

And I’ve observed increased taxes after fixing traffic issues. I’m not sure about the cause, it might be that commercial zones produce more money when they get people-traffic. Or it might be the better service access, who knows.

And of course, traffic jams add a lot to noise. This can be countered (trees), but it’s a factor.

Attribution
Source : Link , Question Author : Philipp , Answer Author : Luaan

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