Developing an Optimization Model to Manage Unpaved Roads

Table 2

County unpaved road treatment decision process.

Distress & condition	Service level
	Very high	High	Medium	Low	Very low	None
Cross section/crown
(1) Poor	HB	HB	HB	HB	LB	N
(2) Fair	LB	LB	LB	LB	N	N
(3) Good	N	N	N	N	N	N
Roadside drainage
(1) Poor	RC	RC	DR	DR	HB	N
(2) Fair	DR	DR	HB	HB	N	N
(3) Good	N	N	N	N	N	N
Rutting
(1) Failed	RC	RC	RC	RG	HB	N
(2) Very poor	RC	RC	RG	HB	HB	N
(3) Poor	RC	RG	HB	HB	LB	N
(4) Poor	RG	HB	LB	LB	N	N
(5) Fair	HB	LB	N	N	N	N
(6) Fair	LB	N	N	N	N	N
(7) Good	N	N	N	N	N	N
(8) Good	N	N	N	N	N	N
(9) Very good	N	N	N	N	N	N
Potholes
(1) Failed	RC	RC	RC	RG	HB	N
(2) Very poor	RC	RC	RG	HB	HB	N
(3) Poor	RG	RG	RG	HB	LB	N
(4) Poor	RG	HB	HB	LB	N	N
(5) Fair	HB	HB	LB	N	N	N
(6) Fair	LB	LB	N	N	N	N
(7) Good	N	N	N	N	N	N
(8) Good	N	N	N	N	N	N
(9) Very good	N	N	N	N	N	N
Loose aggregate
(1) Failed	RG	RG	RG	RG	RG	N
(2) Very poor	RG	RG	RG	RG	TG	N
(3) Poor	RG	RG	RG	TG	HB	N
(4) Poor	RG	TG	TG	HB	N	N
(5) Fair	TG	HB	HB	N	N	N
(6) Fair	HB	N	N	N	N	N
(7) Good	N	N	N	N	N	N
(8) Good	N	N	N	N	N	N
(9) Very good	N	N	N	N	N	N
Corrugations
(1) Failed	RG	RG	RG	RG	RG	N
(2) Very poor	RG	RG	RG	RG	RG	N
(3) Poor	RG	RG	RG	RG	N	N
(4) Poor	RG	RG	RG	N	N	N
(5) Fair	RG	RG	TG	N	N	N
(6) Fair	TG	TG	N	N	N	N
(7) Good	N	N	N	N	N	N
(8) Good	N	N	N	N	N	N
(9) Very good	N	N	N	N	N	N
Dust
(1) High	RG	RG	RG	N	N	N
(2) Medium	TG	TG	N	N	N	N
(3) Low	N	N	N	N	N	N
(4) None	N	N	N	N	N	N

Note. N: none; LB: light blading; HB: heavy blading; TG: treating gravel; DR major drainage repair; RG: regravel; RC: reconstructing; Source: Wyoming Technology Transfer Center.