Induced demand is real, Vol. 42: "Our results suggest that increasing network capacity is in general not an efficient solution to manage [motor vehicle] congestion, in the sense that the average travel speed in the network does not increase substantially with an increase in capacity."
https://www.sciencedirect.com/science/article/pii/S0965856423001465
@killick yes it does. The 'virtuous cycle' of more transit service to more places, or safer connections to more places, absolutely induces more participation, which itself brings many positive second-order benefits, many of which further encourage creation of more service. That's what earns them the 'sustainable' in 'sustainable transportation'