Abstract:
This study presents the concept of “Dynamic Passenger Car Unit (DPCU)” for the urban
local roads under heterogeneous traffic condition, and it reflects that the Passenger Car
Unit (PCU) is not a static factor as assumed. The parameter considered for the estimation
of the DPCU are (1) average speed of vehicle (2) projected rectangular area of vehicle (3)
length of vehicle. The traffic data was collected at the mid-block section as of the following
roads: (1) Nana mava road (2) Raiya road. Both roads having same geometric condition.
The mid-block section was kept of 30m and traffic data was collected. The roads are two
lane divided roads and having different traffic composition. The mid-block section was
such selected that it was free from parked vehicles, bus stop, effects of the intersection,
curvatures etc. The DPCU was obtained by following two methods: (1) Homogenization
coefficient method (2) Chandra’s method. The traffic data was collected using
videography method for in morning 8:00am to 12:00pm and in evening 4:00pm to 8:00pm
was concluded for the roads by the study of traffic volume. The peak hour traffic was used
to calculate the DOCU values and efforts were made to suggest the best reliable DPCU
value.
