![How Traffic Signal Controllers Work, Part 2: Programming a Modern Controller and a Look at Their Limitations | North Star Highways How Traffic Signal Controllers Work, Part 2: Programming a Modern Controller and a Look at Their Limitations | North Star Highways](https://northstarhighways.files.wordpress.com/2016/09/controllers-12.jpg?w=584)
How Traffic Signal Controllers Work, Part 2: Programming a Modern Controller and a Look at Their Limitations | North Star Highways
![How Traffic Signal Controllers Work, Part 2: Programming a Modern Controller and a Look at Their Limitations | North Star Highways How Traffic Signal Controllers Work, Part 2: Programming a Modern Controller and a Look at Their Limitations | North Star Highways](https://northstarhighways.files.wordpress.com/2016/09/controllers-15.jpg)
How Traffic Signal Controllers Work, Part 2: Programming a Modern Controller and a Look at Their Limitations | North Star Highways
![How Traffic Signal Controllers Work, Part 2: Programming a Modern Controller and a Look at Their Limitations | North Star Highways How Traffic Signal Controllers Work, Part 2: Programming a Modern Controller and a Look at Their Limitations | North Star Highways](https://northstarhighways.files.wordpress.com/2016/09/controllers-07.jpg?w=584)