Studies have found that suicide prevention systems at common locations prevent suicides and that people do not seek alternatives. Most regret suicide attempts.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2610560/

It’s likely that interventions to prevent suicide via the medical system would be effective and offering counseling would help. It’s unlikely that those seeking assisted suicide would walk in front of a car or jump off a bridge.