an ascending gradient meets with another ascending gradient
an ascending gradient meets with a descending gradient
a descending gradient meets with another descending gradient
an ascending gradient meets with a level surface
0.38 N V3/2
0.38 (NV3)″2
3.8 NV″2
3.8 (NV3)″2
zero
64m
80m
60m
annual average hourly volume
annual average daily traffic
thirtieth highest hourly volume
peak hourly volume of the year
average speed
spot speed
space-mean speed
time-mean speed