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To counteract the weight of the barricades arm. This way the counter weight will do most of the work when the barricade is lifted.
To counteract the weight of the barricades arm. This way the counter weight will do most of the work when the barricade is lifted.
The counterweight offsets the weight of the long wooden and or metal barrier that blocks the path of the car- makes for lighter lifting of the barricade by hand or motor.
railroad crossing signs are railroad crossing signs, a baby could figure that one out.
An X. Because it is a cross for the railroad crossing.
The purpose of a railroad crossing sign, is to let you know that there is a railroad coming up or that there is one right in front of you.
The Transcontinental Railroad
When carrying "Haz-mat" (hazard material) cargo
Be happy and think then you will get the answer
level crossing = railroad crossing
railroad crossing sign
Railroad crossing