Integration of noise in Pavement Management Systems
Invited paper
Danish Road Directorate
Wednesday 3 june, 2015, 11:20 - 11:40
0.2 Berlin (90)
Abstract:
Road administrations use a systematic approach when planning the maintenance
of pavements. A Pavement Management System (PM System) is used. Such a System
is based on a database and a pavement renewal optimization algorithm where
parameters are converted into monetary values that are used in the
optimization process. Information about pavement type, age and conditions etc.
is stored in the database. The pavements condition is measured every year or
less frequent. Parameters like friction, surface texture, evenness and wear
and tear are included. The optimization algorithm is used to predict the
economical most optimal strategy for renewal of the old pavements. The Danish
Road Directorate has conducted a project to develop methods on how noise can
be integrated in PM Systems. Part of this has been to select a test road
network of a length of 111 km. CPX trailer noise measurements has been
performed and stored in a database as noise source data together with the
relevant pavement information. Noise mapping in 1 dB intervals has also been
performed along this test road network. The noise mapping can been adjusted to
the actual measured noise emissions and used as noise exposure information.
Using a price on noise exposure expressed as price per dB per dwelling, noise
mapping data can be used to predict a yearly cost of the noise along the test
road network. A simple acoustic aging model for pavements has been developed
on the background of empirical data. The aging model can be used to estimate
the increase in noise exposure over the years and this makes it possible to
predict the increasing cost of noise. In this way the actual noise from
pavements are converted into a cost that can be integrated in a PM System.