Editing Track gauge (section)

== Timeline ==
{|class="wikitable sortable"
! Gauge !! Date !! Chosen by
|-
| {{nowrap|{{Track gauge|4ft8.5in}}}} || 1825 || [[George Stephenson]]
|-
| {{Track gauge|5ft}} || 1827 || [[Horatio Allen]] for the [[South Carolina Canal and Railroad Company|South Carolina Canal and Rail Road Company]]
|-
| {{Track gauge|1ft11.5in}} || 1836 || [[Henry Archer]] for the [[Festiniog Railway]] to easily navigate mountainous terrain <br />(Britain's first steam-hauled narrow gauge passenger service in 1865) (originally horse-drawn)
|-
| {{Track gauge|7ft0.25in}} || 1838 || [[I. K. Brunel]]
|-
| {{Track gauge|5ft}} || 1842 || [[George Washington Whistler]] for the [[Moscow – Saint Petersburg Railway]] based on Southern US practice
|-
| {{Track gauge|5ft3in}} || 1846 || Chosen in Ireland as a compromise
|-
| {{Track gauge|5ft6in}} || 1853 || [[Lord Dalhousie]] for [[British India]], following recommendations of Mr. W. Simms, a consulting engineer<ref>{{cite book |last1=Chandra |first1=Satish |last2=Agarwal |first2=M.M. |date=2013 |title=Railway Engineering, Second Edition |location=India |publisher=Oxford University Press |page=32 |isbn=9780198083535}}</ref><ref>{{cite web |url=https://www.business-standard.com/article/opinion/broad-and-standard-118042000034_1.html |title=Broad and Standard |last=Debroy |first=Bibek |date=20 April 2018 |website=business-standard.com |publisher=Business Standard |access-date=9 January 2024}}</ref>
|-
| {{Track gauge|3ft6in}} || 1862 || [[Carl Pihl]] for the [[Røros Line]] in Norway to reduce costs
|-
| {{Track gauge|3ft6in}} || 1865 || [[Abraham Fitzgibbon]] for the [[Queensland Railways]] to reduce costs
|-
| {{Track gauge|3ft}} || 1870 || [[William Jackson Palmer]] for the [[Denver and Rio Grande Western Railroad|Denver & Rio Grande Railway]] to reduce costs (inspired by the [[Festiniog Railway]])
|-
| {{Track gauge|2ft}} || 1877 || [[Billerica and Bedford Railroad|George E. Mansfield]] for the [[Billerica and Bedford Railroad]] to reduce costs (inspired by the [[Festiniog Railway]])
|-
| {{Track gauge|2ft6in}} || 1887 || [[Everard Calthrop]] to reduce costs; had designs for a matching fleet of rolling stock
|}