Right on Track

With my increased mileage, I am well on course in my virtual ride to arrive in Houston right on time for my actual arrival on 20th of August.
Less than 1,000 miles to go now.
As a pedal south through Tennessee I find myself smiling, warmed my the summer sun.
As I follow an old a rail track and a tune starts piecing itself together in my head.
Slowly at first, then increasing in tempo, making my feet dance on my pedals until I am racing. My heartbeat in time with the sleepers I am passing.
Two shrill whistles sound behind me..............
It can only be one thing

I approve of trains