Years ago, I felt the frequent bumps. Now I don't anymore. Once in a while, I ride the Metra line in Chicago. I never feel the expansion joint bumps. How's that possible?
2007-08-23 15:19:36 · 4 answers · asked by L Dawg 3 in Science & Mathematics ➔ Engineering
Traditionally, rails were laid in 30 foot sections. Now the preferred practice is welded rail, which has expansion joints only one every several hundred feet.
Hence the demise of the old "clickety-clack."
2007-08-23 15:35:16 · answer #1 · answered by aviophage 7 · 4⤊ 1⤋
Normally rails are laid in very long sections now as opposed to the old method of using short sections which means that there are far fewer joints to cause a bumpy ride.
2007-08-23 15:30:49 · answer #2 · answered by jesbud51 2 · 0⤊ 1⤋
joints are still there but alot of improvements were insrted to trains and wheels
now wheels consists of tow metal rings with rubber between them to absorb shoks
2007-08-24 01:08:54 · answer #3 · answered by koki83 4 · 0⤊ 0⤋
improvments in wheels,[material] better joints,
Better shock asorbers,
some times they weld the joints for higher speed service,
2007-08-23 15:29:06 · answer #4 · answered by William B 7 · 0⤊ 1⤋