My car was rear-ended at a red light. Four cars were involved, four different insurance companies, all cars had libility only.

I can't answer trhe question for your state but here in Pennsylvania the insurance regulations permit you to contest the offered amount and produce...

Can you sue a dealership for negligent or something along that line?

You should call them immediately and request/demand that they pay for any fine which you may have received. They should take immediate steps to...

If a surgeon fails to inform/disclose to a patient that they planned to perform a most radical procedure that was not needed

Probably yes. However, you would need to contact a medical malpractice attorney for review of records ans consult. One from MN.

If a car was hit before but gets struck again…

Only for the new damage. You are entitled to the fair market value of the bumber before it got hit.

On a four lane divided curb and gutter section, a disable car should move to right lane?

yes. Peter Hart

What should I do in this case involving a traffic accident?

If they haven't issued a citation by now they probably do not intend to. You can still succeed in a civil case against her. Retain a personal...

Can one seek compensation for aggravation?

Yes. You may file a claim for your out of pocket costs which could include the value of your labor. Good luck. Peter Hart

I made a left hand turn from a one way street to a two way street and the person that hit me was driving on the island divider.

Good question but you may have a problem-even if the other driver waived you on. You must still proceed into the intersection with caution. ...

You should not be talking to the pedestrian. In Pennsylvania you/your insurance company need not give this information unless a lawsuit is filed. ...

Medical malpractice misdiagnosed

There could possibly be more than one doctor at fault. If so they would be considered joint tortfeasors and each held responsible for a percentage...