Figure 2 Analysis of Vehicles Traveling at Speeds Below 60 mph,,,,,
Six-lane sections,,,,,
,% with speed below 60 mph,,Average speed (mph),,
,% Trucks,% Cars,Trucks speed,Cars speed,
Shoulder,3.23,2.41,58,58,
Middle,0.06,0.10,57,55,
Median,0.00,0.00,,,
Shoulder,2.50,8.34,58,58,
Middle,0.19,0.16,59,58,
Median,0.02,0.02,55,38,
Shoulder,3.10,3.74,58,58,
Middle,0.12,0.26,58,58,
Median,0.17,0.27,59,57,
,,,,,
Four-lane sections,,,,,
,% with speed below 60 mph,,Average speed (mph),,
,% Trucks,% Cars,Trucks speed,Cars speed
Median,0.18,0.07,46,53
Shoulder,1.63,0.90,56,57
Shoulder,1.70,1.59,57,57
Median,0.09,0.14,49,59
Shoulder,1.31,1.89,57,56
Median,0.08,0.58,56,42
Shoulder,13.49,7.93,56,56
Median,6.84,3.73,54,54
Shoulder,0.96,3.35,52,58
Median,0.06,0.03,38,59
"Note: In the median lane on highway 320, no vehicles traveled below 60 mph.",,,,