13345/23346 Singrauli/shaktinagar-varanasi intercity express crossing markundi ghats between chopan-chunar streach of N.C.R. allahabad divison. the markundi ghat lies between agori khas and churk station.
Markundi ghats is the majar reason of low mps of chunar-chopan streach, that's why all train of this route have very slow speed.
Source -self .