You did the right thing. Part of my commute involves a slow ride on the sidewalk across the street from the police station and city hall. It's either ride there, ride the wrong way on the street for 2 blocks, ride way the heck around the block with the police station or ride through a busy drug store parking lot and I've done it for years. Last week I saw 3 different squad cars take off like they were going on a call, and the third one slowed to wait for me as I got to the corner where I can get back on the street and ride with traffic. I was worried they were going to say something about it, but they slowed to make it easier for me to get back on the street. The smile and wave let me know I didn't have anything to worry about, and I don't think you did either.