Talk:Kentucky Route 80

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Length notes

Length by county, in miles. Progression is from west to east.

Hickman	3.443
Carlisle	15.009
Graves	11.543 - route log has road ending at US 45/KY 58 in Mayfield
Calloway	12.479 - route log has road beginning again at US 641 north of Murray
Marshall	1.937 0.925 overlap with US 68
Trigg	28.112 overlap with US 68
Christian	10.930 overlap with US 68 0.529 overlap with US 41/US 68 10.184 overlap with US 68
Todd	14.422 overlap with US 68
Logan	29.223 overlap with US 68
Warren	13.060 overlap with US 68 6.235 overlap with US 31W/US 68 12.036 overlap with US 68
Barren	12.577 overlap with US 68 0.055 overlap with US 31E Business/US 68 9.679 overlap with US 68
Metcalfe	9.002 overlap with US 68 7.888
Adair	11.775 2.369 overlap with KY 61 0.507 0.11 overlap with KY 55 (the loop in Columbia) 0.556 overlap with KY 55 9.776
Russell	7.489 0.540 overlap with KY 76 3.075
Casey	5.144
Pulaski	40.100
Laurel	11.211 1.502 overlap with US 25 13.716
Clay	7.537 16.915 overlap with US 421
Leslie	13.814 overlap with US 421 9.719
Perry	7.910 1.613 overlap with KY 15 7.952
Knott	20.093
Floyd	14.435 12.765 overlap with US 23/US 460
Pike	13.730 overlap with US 23/US 460 14.374 overlap with US 460 6.941

By no means complete, but it's a start:

1938 ALA Green Book and 1939 state map has west end of KY 80 at US 31W east of Bowling Green - alignment east of that point is more or less the same as today, save for local realignments
- what later became KY 80 was KY 98 west of Aurora and US 68 between Aurora and Bowling Green
KY 80 extended west to Columbus between 1949 (RMcN map of KY and TN) and 1957, replacing KY 98 and overlapping US 68 between Aurora and Bowling Green
2000s Mayfield-Murray-Aurora realignment, based on the change logs of the Marshall, Graves, and Calloway County SPRS listings:
- July 18, 2002: KY 80 renumbered to KY 402 from KY 58 in Brewers (former ET of overlap) to US 68 in Aurora, splitting KY 80 in two
- February 28, 2005: new KY 80 in Marshall County and part of new KY 80 in Calloway County (US 641 to county line[2]) accepted into system, replacing a short section of KY 94 near Aurora between the east end of the new road and US 68
- June 4, 2008: new KY 80 in Graves County and part of new KY 80 in Calloway County (county line to KY 1836[3]) accepted into system
- February 18, 2010: part of new KY 80 in Calloway County (KY 1836 to US 641) accepted into system
  - article says the last segment opened November 25, 2009, but doesn't provide a source for it – T M F 08:21, 23 August 2010 (UTC)[reply]
  - Here's a news article backing it up: [4] – T M F 08:27, 23 August 2010 (UTC)[reply]