Environmental Assessment
Volume B-5.5
Mine
Traffic
Ambatovy Project
395
January 2006
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oscillation of the vehicle suspension or “axle hop” (oscillating load)
(Hunaidi 2000).
The amount of vibration generated depends on the speed of the vehicle, the
condition of the roadway and the type or condition of the vehicle suspension.
Vehicles used for the project are expected to be similar to other vehicles of the
same class in Madagascar and will be expected to follow posted speed limits.
Routes RN2 and RN44 are paved roads in relatively good condition. The routes
through Moramanga are well used and may have more irregularities (potholes
and damage from use) due to the existing traffic levels. Changes to existing
levels of ground vibration would occur based on the increase in vehicles due to
the project. As stated in Table 5.5-5, one to two trucks per hour and one bus per
hour may occur due to the project during construction, which is up to a 7%
increase in these types of vehicles.
The amount of change in ground vibration along the project access road will
depend on the amount of existing traffic and the roadway conditions. The
amount of project traffic on this road may be as high as the project traffic through
Moramanga (1 to 3 heavy vehicles per hour) and the road surface is expected to
be graded gravel. Mitigation for vibration may be necessary if homes are very
close to the roadway (within 200 m) and if road conditions deteriorate (such as
after a weather event). This road will be widened and improved by the
proponent, and will be maintained to help reduce vibration impacts.
5.5.5.3 Mitigation
Mitigations to protect against accidents and promote public safety will include:
•
road improvements to minimize disturbance and risks especially at
intersections where project roads meet public roads;
•
workforce codes of conduct and training programs with respect to
driving; and
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public education.
In Moramanga, the proponent will work with the municipal government to
determine appropriate local procedures (routes and speed limits) for project
vehicles moving through the town.
