| dc.description.abstract | The transportation vehicles gradually grew in site with growing economic
developments, but the pavement management budget didn’t increase year by year.
Furthermore, a complete pavement management system has not been constructed
in most of the internal road authorities. In the principle of not increasing the
maintenance activities of road agencies, this study focus on the present conditions
in Taiwan and propose a structure for constructing a network-level pavement
management.
Pavement maintenance is according to the survey and evaluation of pavement
distress condition. The present method of a fast and effective survey can be
performed by on automatic road survey vehicle. However, this kind of equipment
is not only high in cost but also needs to be operated by professional engineers.
Consequently, the lower levels of road authorities won’’t be able to afford it. In light
of this standpoint, this study adopted the visual survey method. Combined with
fuzzy mathematics, which is used to transform subjective visual judgment into
objective evaluation, eighteen distress types of the membership functions are
constructed. Based on these analyses, Pavement Condition Quality Index (PCQI)
can be formulated which, after comparing with PCI(Pavement Condition Index),
can be used to clarify that pavements are in good conditions, and can therefore be
utilized as pavement maintenance criteria.
As for pavement maintenance, because experienced pavement maintenance
engineers in Taiwan are absent or retired, in order to continue maintenance
operations, this study will pick out a pavement maintenance method, and using the
MIS express method in the expert system, with credence from experienced experts,
pavement management personnel can execute maintenance strategies according to
the decision tree in actual inspections.
In the past, the maintenance sections are normally determined by experienced
engineers. Hence, the subjectivity can effect the decisions. In this study, factors
such as traffic volume, PCQI, rainfall, etc. are considered. After finding the
PI(Priority Index) value using fuzzy integrals method, analyzed by 0-1 integrated
mathematical programming, and depending in the annual maintenance budget
allocation, we can choose the maintenance sections for the year, which is more
objective and less disputed.
Although there are maintenance decision methods mentioned above, but
without DBS(Data Base System) during execution, even a good method would
become loss attractive. After merging the preceding analyses into the web
geographic information system, road authorities can promote management tasks
and the populace can acquire the road management informations and the road
condition or construction sections. Traveling time can be saved by detouring these
sections and the driving quality can also be improved. | en_US |