It was possible to travel by metre gauge all the way from Delhi to Lucknow in 1976 and for many years after that. This the route via Rewari and Achnera:
Delhi Jn
5 Delhi Serai Rohilla
15 Delhi Cantt
32 Gurgaon
83 Rewari (end of NR)
157 Alwar
217 Bandikui
314 Bharatpur
342 Achnera (end of WR)
377 Mathura Jn
428 Hathras Road
482 Kasganj
590 Farukhabad
595 Fatehgarh
727 Kanpur Anwarganj
730 Kanpur Central
733 Kanpur Anwarganj
750 Unnao
821 Lucknow (NER)
The BG distance from Delhi Jn to Lucknow by broad gauge was then 509 km via Kanpur and 487 km via Moradabad.
By metre gauge, there was an Agra Fort-Lucknow Express which joined this route at Achnera. For a short time in the mid-1970s, the metre gauge Vaishali Express ran from Agra Fort to Siliguri via Kanpur and Lucknow.