Figure 4.7: Pie Chart Showing Directional Split Between The Two Directions 4.3 DETERMINING LEVEL OF SERVICE OF THE ROAD. 4.3.1 Determining free flow speed. The free flow speed was determined for a capacity of more than 200pc/h. Therefore the FFS is determined as thus. FFS = estimated free-flow speed (km/h), SFM = mean speed of traffic measured in the field (km/h) = 66.37 Vf = observed flow rate for the period when field data were obtained (veh/h) = 1948 veh/h fHV = heavy-vehicle adjustment factor, determined as shown below where PT= proportion of trucks in the traffic stream, expressed as a decimal; PR= proportion of RVs in the traffic stream, expressed as a decimal
Figure 4.7: Pie Chart Showing Directional Split Between The Two Directions 4.3 DETERMINING LEVEL OF SERVICE OF THE ROAD. 4.3.1 Determining free flow speed. The free flow speed was determined for a capacity of more than 200pc/h. Therefore the FFS is determined as thus. FFS = estimated free-flow speed (km/h), SFM = mean speed of traffic measured in the field (km/h) = 66.37 Vf = observed flow rate for the period when field data were obtained (veh/h) = 1948 veh/h fHV = heavy-vehicle adjustment factor, determined as shown below where PT= proportion of trucks in the traffic stream, expressed as a decimal; PR= proportion of RVs in the traffic stream, expressed as a decimal