Answer:
When it comes to me you go on red and stop on green.
I am a protector. I sit on a bridge. One person can see right through me while others wonder what I hide.
You can catch me but cannot throw me. What am I?
I hop around and deliver eggs at Easter.
I run through hills. I veer around mountains. I leap over rivers and crawl through the forests. Step out your door to find me. What am I?
I start with T end with T and within me is T.