The inside rails inside of the main rails are called guard rails. They are there so that if there is a derailment the train will stay within the rails instead of off of the trestle.
A Trestle
it is a frame to support a load like railroad tracks and it is made of wood
Jeffrey "Maniac" Magee was in shock and disbelief at what he saw on the trestle because it was a dangerous and life-threatening situation. The sight of the approaching train and the boys stuck on the tracks paralyzed him temporarily, preventing him from processing the situation quickly.
Preserved animal tracks are called trace.
train tracks or a railroad
If you're tracking an animal, tracks and dung are called spoor.
Snail tracks are called snail tracks...I think! ;) haha i think soo too :D
tracks
Trace
second law
Inside mines. Long before railroads were built.
Trace