Why No HAZMATS Signs on Leonardi Street?

Our City could easily erect a sign at the intersections leading to Leonardi Street, stating "No HAZMATS. This would exclude through trucks carrying explosive propane, while allowing local propane deliveries on Leonardi Street. Why was this not done years ago? What principled reason exists, if any, for our City Manager, WILLIAM B . HARRIS, refusing to "just say no" to Amerigas and UGI? Mr. HARRISS, we will print your response.