What's the adjective for railbuses? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs rail and railroad which may be used as adjectives within certain contexts.
“I negotiated the railless stairs and dark corridor without too much injury to my person, and managed to fumble the wooden latch open.”
“From 1908, railed electric buses, railless electric buses and power-driven buses appeared successively, ushering in a period of prosperous transportation.”
“Reluctantly, my left hand on the railless wall on that side, my right hand extended out into the blank abyss in the other direction, I began the descent.”