Sharraxaadda

Hello,
This is in regards to the left hand turning lane at westbound Redwood street onto the I 80 west onramp. Could somebody please add signage to clarify that there is a carpool lane on the onramp? So many drivers don't know that there is a car pool lane there until they are already in it. Then they don't seem to know what to do other than jump into the right lane. I have almost been hit in the right lane many times by someone avoiding the carpool lane or swerving into the right lane. There's is no warning sign on the light. A sign to make it clear would be much appreciated. Thank you!