How many people cross at red lights when there are no cars to be seen for miles around?
And above all: how much are they influenced by the "negative" example of other people? A German research team secretly observed people at traffic lights in Munich to find out...
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Studies (only a small selection):

Bergquist, M., Helferich, M., Thiel, M., Hellquist, S. B., Skipor, S., Ubianuju, W., & Ejelöv, E. (2023). Are broken windows spreading? Evaluating the robustness and strengths of the cross-norm effect using replications and a meta-analysis. Journal of Environmental Psychology, 88, 102027.

Keuschnigg, M., & Wolbring, T. (2012). Physical Disorder, Social Capital, and Norm Violation.

Keuschnigg, M., & Wolbring, T. (2015). Disorder, social capital, and norm violation: Three field experiments on the broken windows thesis. Rationality and Society, 27(1), 96-126.

Mullen, B., Copper, C., & Driskell, J. E. (1990). Jaywalking as a function of model behavior. Personality and Social Psychology Bulletin, 16(2), 320-330.

Volker, B. (2017). Revisiting broken windows: The role of neighborhood and individual characteristics in reaction to disorder cues. Sociological Science, 4, 528-551. https:// doi.org/10.15195/v4.a22

Wolbring, T., & Keuschnigg, M. (2015, July). Field experiments in the social sciences. In Experiments in the social sciences (pp. 222-250). Nomos Verlagsgesellschaft mbH & Co. KG.