|Line of route|
|Khushalgarh to Thal|
|Gauge / mileage|
|Narrow (2' 6") gauge||92 miles (1905)|
|Broad (5' 6") gauge||101 miles (1918)|
|Worked by North Western Railway|
|How to interpret this infobox|
This section was first surveyed as a BG line in April 1899. A decision was made in March 1901 that no bridge would be built over the Indus river at Khushalgarh and that instead a ropeway would be built over the river. As a consequence it was decided that a BG line would not be built and a 2ft 6in/762mm narrow gauge(NG) would be constructed from the right bank of the Indus facing Khushalgarh to Kohat, a distance of about 30 miles(48km) and opened in May 1902 . This section was converted to BG and re-opened in 1908 (see below).
This 2ft 6in/762mm NG extension of 62 miles(100km) from Kohat through the Kohat Pass up the Miranzai Vallet to Thal near the Afghan border , opened in stages from Mar 1901 reaching Thal in Apr 1903 . This section was converted to BG and re-opened in 1908 (see below).
In March 1902 haulage experiments were carried out on the unopened part of the NG line with a section of 'John Fowler' portable tramway using a passenger carriage and two wagons hauled by both a mule and a pair of bullocks . The purpose and outcome of these experiments is not known.
Indus River Crossing
In 1903 an accident closed the ropeway over the Indus River and a boat bridge replaced it. Eventually the decision was made to construct the Khushal Garh Bridge crossing the Indus river and at the same time to convert entire line to Thal from NG to broad gauge(BG).
The BG line was opened in 1908 thus connecting from Jand on the NWR mainine through to Kohat as the ‘NWR Frontier Kohat Section’ , 39 miles(63km)  and the ‘Kohat-Thal Section’, 62 miles(100km) remaining as a NG section to Thal, the entire line was merged into the NWR System .
- L/MIL/7/14848; "Collection 335/15 Railway construction: Loi Shilman, Kohat-Thal, Thal-Parachinar lines."; 1908
- "Administration Report on the Railways in India – corrected up to 31st March 1918"; Superintendent of Government Printing, Calcutta; page 107; Retrieved 9 Mar 2017
- "Administration Report on the Railways in India – corrected up to 31st March 1918"; Superintendent of Government Printing, Calcutta; page 128; Retrieved 9 Mar 2017
- “Industrial Railways and Locomotives of India and South Asia” compiled by Simon Darvill. Published by ‘The Industrial Railway Society’ 2013. ISBN 978 1 901556 82-7. Available at http://irsshop.co.uk/India. Reference: Entry IA03 page ....
- “British Library Archives and Manuscripts Catalogue” - Search; Retrieved 3 Apr 2016