When the contractors who worked on my house left their trash behind (a hodgepodge of roof shingles and things, a bucket of dried out concrete and sticks, it was just a mess), I took their construction trash to the dump on Reisterstown Road after I called 311 and researched how to access the dump online. Pretty sure either 311 or the internets told me not to get in the long line if I am a resident of the city. Indeed, there was a long line for actual contractors, but when I arrived near closing time, I did not get in the line but drove to the left of the line to the woman standing there, and told her I was a resident of the city with stuff some contractors left at my house. I was the only person in the line. I showed my ID showing I actually live in the city, and they sent me back to dump it. It was very anti-climatic. I basically got to the place and it was just a humongous dumpster that I put the stuff in. Very easy for me.

I was just in my regular Subaru, and it was a pretty smooth, simple interaction for me.