Answer:
A trail, a union, together tied. Come across me and you will find you cannot change the course I'm on. Without me you cannot travel on. What am I?
I am heavy forward, but backward I'm not. What am I?
I am known for my natural tuxedo and marching
I am milky white and scares people.
I smell like blue paint pours like green paint and I look like a red truck.
What did the piece of wood say when he saw the screwdriver and screws approaching?