Traffic collision on Helen Avenue in Rancho Cucamonga Heard on: San Bernardino County Fire - Valley 00:09 Traffic collision, Medic Engine 172 and 7418 , Helen Avenue between Pacific Electric Trail and Palo Alto Street. Transcript This transcript is auto-generated from live dispatch audio and may be incomplete or inaccurate. It is not an official report and may change. Traffic collision, Medic Engine 172 and 7418 , Helen Avenue between Pacific Electric Trail and Palo Alto Street. 9/6/2026 07:25 PM Traffic Palo Alto St, Rancho Cucamonga, CA 91730 View on map