Traffic Design | DESIGN TRAFFIC FORMULA
Traffic Design | DESIGN TRAFFIC FORMULA
INTRODUCTION :
Traffic Design:
1.Signalization:
Walter P Moore offers studies to determine the best type of intersection traffic control, such as traffic signals, two-way stop, four-way stop or alternatives like roundabouts. We work with a variety of clients, ranging from state, city and county transportation agencies to developers.
2.Traffic Control:
When converting an existing street to a new configuration, careful attention must be given to maintain active traffic control during construction. We work diligently to allow for continued flow of operations, whether it involves auto, rail and/or pedestrian traffic, during site and roadway improvements.
3.Intersections:
Intersection projects consist of developing schematic plans of modifications to existing areas or proposed intersections and roadway segments. Our designs include details such as lane widths, turning radii, lane alignment through intersections, median width, and median length. Special consideration is given to intersections with high volumes of truck or bus traffic that may require larger lane widths or turning radii and sites with sight distance issues.
4.Roadways:
Our team develops roadway designs in several phases: conceptual, schematic, and final designs. The traffic engineering aspects include signalization, traffic control, and intersection design as well as the detailed alignment of the roadway to ensure easy movements for all vehicles while paying close attention to the details of pedestrian crossings.
DESIGN TRAFFIC FORMULA:
The design traffic
is considered in terms of cumulative number of standard
axles (in the lane
carrying maximum traffic)
to be carried during the design life of pavement
using
N The
cumulative number of standard axles to be catered for in the design life in
terms of msa
A Initial traffic in the year of completion of construction in terms of the number of commercial vehicles per day
D Lane distribution factor
F Vehicle
damage factor
n Design
life in years
r Annual growth rate of commercial vehicles The traffic in the year of completion is estimated using
A = P(1 + r)x
P Number
of commercial vehicles as per last count
x Number of years between
the last count and the year of completion of construction
COMMENTS