Description:
The goal of transportation is generally stated as the safe and efficient movement of people and goods. To achieve this goal, designers use many tools and techniques.
One technique used to improve safety on roadways is to examine the consistency of the design. Design consistency refers to highway geometry’s conformance with driver expectancy. Generally, drivers make fewer errors when encountering geometric features that conform to their expectations.
Speed Profile, main
screen
An inconsistency in design can be described as a geometric feature or a combination of features with unusual or extreme characteristics that may cause drivers to drive in an unsafe manner. This situation could lead to errors in speed
judgment, inappropriate driving maneuvers, and/or an undesirable number of accidents.
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This program provides an estimate of the expected 85th percentile speed profile for cars and trucks and also provides an estimate of design consistency.
It is intended to be
used in preliminary
highway planning and as
an estimation model
to identify
inconsistencies in
horizontal design of
two-lane highways. It is
not intended to be used
as a speed limit
determination tool.
Truc /
Car
Speed Prfile
Design
Considerations
·
Code optimizing: long and complicated algorithms required an optimal code to decrease calculation time and improve performance.
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Friendly Graphical User Interface: all user interaction is shown on a single screen, divided into the control panel and a window display for the results.
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