A heated debate over the expansion of highways in Switzerland pits safety advocates against critics. Micaël Tille, an ETH Lausanne expert, argues that adding lanes will divert traffic from less safe roads, reducing accidents overall. His study indicates a significantly lower accident rate on highways compared to municipal roads. Conversely, traffic planner Thomas Hug warns that increased traffic volumes will ultimately elevate risks, particularly for vulnerable road users like cyclists and pedestrians. The discussion raises critical questions about the balance between infrastructure development and public safety.