On one ever came to overdose I called in

I was driving through kent on my way somewhere else when I saw a man nodding out in the middle of a traffic median. He was panhandling and started nodding out , laying down with his head IN traffic. At one point he was still for so long I was sure he had overdosed. I called 911 and told them an overdose was occuring and gave them the address. I waited a long time and no one ever came. I saw a bunch of pedestrians walk right past him. I tried to talk to a shop owner but he seemed reluctant to get involved. A police car even drove by him. I was by myself and not sure what to do in this situation. I don’t want to get assaulted trying to administer aid and also I don’t know where to get narcan. I feel like I could have done something but I am new to this situation. He eventually sat back up but kept nodding out so I left. Idk of the police ever came. I waited about 20 min.