Landmark dates in NARS
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This is a list of significant dates in the North American Renewal Set.
Note: "Upgrades" apply to vehicles built after the date. Existing vehicles will not change on the date.
| Year | Event | 
|---|---|
| 1850 | Planned start of extended set. | 
| 1920 | Start of standard set. | 
| 1925 | Introduction of 4-8-2 Mountain (Steam) | 
| 1927 | Introduction of 2-8-4 Berkshire (Steam) Introduction of 2-8-8-2 Mallet (Steam)  | 
| 1930 | Introduction of 4-6-4 Hudson (Steam) | 
| 1931 | Introduction of 2-10-4 Texas (Steam) | 
| 1934 | Introduction of Pennsylvania GG1 (Electric) in Temperate and Arctic | 
| 1925 | Introduction of 4-8-2 Mountain (Steam) | 
| 1936 | Introduction of 4-6-6-4 Challenger (Steam) | 
| 1937 | Introduction of 4-8-4 Northern (Steam) | 
| 1940 | Introduction of EMD E-Unit (Diesel) Introduction of EMD F-Unit (Diesel) Passenger and mail cars upgraded to Lightweight  | 
| 1941 | Introduction of Alco S2 (Diesel) | 
| 1942 | Introduction of 4-4-4-4 Duplex (Steam) in Temperate | 
| 1945 | EMD E-Unit (Diesel) Upgraded to E7 | 
| 1946 | Introduction of Alco PA-1 (Diesel) EMD F-Unit (Diesel) Upgraded to F3  |