Optimizing Traffic Operation in Designing Specific Upgrades

Table 1

Applied classifications of grade, length of grade, and traffic flow rate [3].

Grade (%)	3–3.5  3.5–4.5  4.5–5.5  5.5–6.5  >6.5
Length of grade (miles)	0.25 0.50 0.75 1.00 1.50 2.00 3.00 4.00
Traffic flow rate (vehicle/hour)	<100 200 300 400 500 600 700 800 >900