The foundation or base structure on which railroad tracks are laid.

रेलमार्ग का बिस्तर

English Usage: The construction crew worked on the railroad bed to ensure it was stable for the trains.

Hindi Usage: निर्माण दल ने निश्चित किया कि रेलमार्ग का बिस्तर ट्रेनों के लिए स्थिर हो।