Wyoming Highway 345

Wyoming Highway 345
WYO 345 highlighted in red
Route information
Maintained by WYDOT
Length	19.27 mi[2] (31.01 km)
Existed	1985[1]–present
Major junctions
West end	S-451 at Montana state line
East end	I-90 / US 14 / US 87 in
Location
Counties	Sheridan
Highway system
Wyoming State Highway System Interstate US State
← WYO 344 → WYO 346

Wyoming Highway 345 (WYO 345) is a 19.27-mile-long (31.01 km) east–west Wyoming State Road located in northern Sheridan County.

Route description[]

Wyoming Highway 345 begins its western end (or northern end at this point) at at the Montana State Line, approximately 3 miles north of Parkman, Wyoming.^[3] For its entire length, WYO 345 parallels the Burlington Northern Santa Fe Railway and to some extent Interstate 90/US Route 87, which lies north of it. Highway 345 travels through the census-designated place (CDP) of Parkman at about 3 miles, as it turns gently southeast. Shortly after, the northern terminus of Wyoming Highway 343, which links to US 14 at Dayton, is met at just under 6 miles. Highway 345 continues eastward toward Ranchester which it reaches nearing 12 miles and US 14 which provides access to exit 9 of Interstate 90.^[3][1] Past Ranchester WYO 345 now closely parallels the interstate in its last stretch. Highway 345 meets Interstate 90/US Route 87/US Route 14 at Milepost 19.27, at the "Acme Interchange," its eastern terminus. The roadway continues east as Acme Road past the interchange to .

History[]

The entire length of Wyoming Highway 345 was originally designated as US Route 87.^[1] This section of US 87 was the last to be decommissioned in favor of the I-90 routing. In March 1985, when I-90 was completed, the Interstate Highway System in Wyoming was completed. At the same time, US 87 was rerouted to Interstate 90 and as a result the former routing through Ranchester became WYO 345.^[1]

Major intersections[]

The entire route is in Sheridan County. ^[4]

Location[4]	mi	km	Destinations	Notes
​	0.00	0.00	S-451	Continuation beyond Montana state line
Parkman	5.81	9.35	WYO 343	Northern terminus of WYO 343
Ranchester	12.80	20.60	US 14 to I-90 / US 87	To exit 9 on I-90
​	19.27	31.01	I-90 / US 14 / US 87	Exit 14 on I-90
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References[]

External links[]

Route map:

• Wyoming State Routes 300-399
• Wyoming Highway 345 - WYO 343 to MT 451/Montana State Line
• Wyoming Highway 345 - US 14 to WYO 343
• Wyoming Highway 345 - I-90/US-14/US-87 to US-14