People often casually dismiss my expertise in a field I've been working in for 20 years. Everyone thinks they are an expert in transportation because they use it every day. I flush the toilet every day, but I do not second guess the plumber when it needs fixing. I just want them to fix it.

if i wanted to know more about sidewalks Id want you to explain! While not an expert, i do know that MUTCD is bias towards cars and conservative against street safety by design!