> [...] usually have a "right answer" from an engineering standpoint, which as you can imagine, has to do with maximizing traffic throughput and/or minimizing d

> [...] usually have a "right answer" from an engineering standpoint, which as you can imagine, has to do with maximizing traffic throughput and/or minimizing delays to each individual vehicle [...] Another common problem is when an Engineer is told to maximise a specific variable, rather than apply their wisdom to determine _which_ variable to optimise. Optimising for more cars usually means that public transport can't improve, and moving around gets worse for pedestrian/bikes. Ultimately, mobility does not improve, and you just need more cars and more car lanes. Car flow improves, but nobody stops to think if that's really the most important thing to improve.