Results of the Freight Connections survey on the effects of banning diesel engines in cities The topic of diesel engine bans is becoming more and more explosive. A growing number of cities want to be emissions-free, and plan to ban diesel-powered vehicles from city centres. For this reason, we wanted to ask you: Have diesel engine restrictions in cities had an impact on your economic existence? The results are in: a clear draw. A heartfelt thank you to all participants! We have sent an email to the winner of the power bank in attractive “DHL Tear Drop Trailer GoGreen”.