This issue arose when trains were getting delayed from turtles getting stuck in a part of the rail-switching mechanism. Implementing these escape routes for turtles to travel through will keep trains from getting any more delayed while keeping their conscience clear from any turtle casualties.
Since the new turtle tunnels started being installed last April, 10 turtles have been observed actually using these underpasses. Pictures below display the hazards of turtles getting stuck in the tracks, while the second photo depicts them using the underpass to cross the tracks safely.