Even in such embodiments, {HEAD ~ the end portions} would still provide added flexibility and would facilitate {TAIL ~ rail section alignment} by limiting resistance of a carriage passing over a substantially misaligned rail section joint 
Even in such embodiments , { HEAD ~ the end portions } would still provide added flexibility and would facilitate { TAIL ~ rail section alignment } by limiting resistance of a carriage passing over a substantially misaligned rail section joint
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH