Hello! My name's Jorge, I am an electronics engineer with experience building and testing embedded circuits.
I have read the description of your project, I would like to know more details of the current version of the pedestrian crosswalk system: current components, and cost. In order to better understand your requirements on the development to be done.
I could get some parts for testing and sending you later back instructions with everything detailed so you can build it at your site. Please contact me to discuss all the steps involved further.
Thanks in advance for your time!