VA 517 and VA 528 out of Denbigh 1932 Official

VA 173 replaces VA 517 and VA 528 1933 Official

Adjustments:  In Aug 1954 (CTB), VA 173 was rerouted at Hornsbyville to proceed to Dandy as it does now. The old route through Seaford over to Back Creek became SR 718.

VA 173 running south of Back Creek 1936 York County

VA 173 east end moved to Dandy 1958 York County

Around 1975, VA 173 was rerouted away from Harris Grove and instead followed SR 622 from Hornsbyville to its current junction with US 17. The old part of VA 173 became more SR 718.
Also around 1975, VA 173 was straightened out where it crosses US 60, which moved from Old Courthouse Way to Warwick Blvd. VA 173 had a duplex with US 60 until this point, as well as using Hoopes Rd and Oriana Rd.
In Feb 1979 (CTB), VA 173 was rerouted to eliminate the US 17 duplex and assume its current York County routing. The new routing was new construction and the old routing became SR 620 Oriana Rd.

VA 173 with US 60 duplex 1958 York County

VA 173 rerouted away from Harris Grove and losing its US 60 duplex 1977 Official

VA 173 is made direct 1980 Official

Improvements:  Paved upon inception;
VA 173's first multilaning was its US 17 duplex in 1965.
VA 173 was multilaned from VA 143 to SR 620 in 1978.
No other multilane segments are shown on VDOT Officials but I know it has been multilaned from US 60 to VA 143 back to at least 1991.
Posting:  Fully posted, though poorly west of US 60.
Multiplexes:  None
Legislative names:  None
Other names:  Denbigh Blvd (west of US 17); Goodwin Neck Rd (east of US 17).
Scenic Byway:  No segments
Comments:  Denbigh was the county seat of Warwick County before Newport News came along.
VA 173 west of US 60 could be decommissioned...serves no purpose whatsoever.