Thursday, May 7, 2015

Highway Maintenance





Highway maintenance is defined as preserving and keeping the serviceable conditions of highway as normal as possible practicable. The main objective of road maintenance management are allocation of available maintenance resources according to actual needs and priorities. If the maintenance works are not done at all or done faulty or the pavement structure is inadequate for present day and loading.
Road maintenance is a series of interdependent activities carried out for preserving and keeping road, road side, highway,  furniture, structure and other facilities in the best possible condition to provide satisfactory and safe transportation along the highway with the optimum cost.
Depending upon the various types of failure and remedial maintenance operations highway maintenance can be calssified as :-
A. Routine maintenance: - Maintenance operation of localized nature required continually on any road whatever it’s engineering characteristics. The works are generally carried out by forced labour  or petty contractor. It covers the following activities:-
i. sweeping of roads.
ii. Maintenance of shoulders.
iii. Cutting of grasses
iv. Cleaning of culverts.
v. Clearing of bridges.
vi. Cleaning of minor sides.
vii. Cleaning of road furniture.
viii. Cleaning of side drains.
ix. Minor re-shaping of drains.
x. Draining the logged water.
B. Recurrent Maintenance:-  Maintenance operation of localized nature of limited extent carried out at more or less regular interval of six months to years with a frequency that depends on traffic volume. The works are generally carried out by contract by the use of minor equipment. It covers the activities like pot hole patching, edge repair, holes and ruts repair, depression repair, local reconstruction etc.
C. Periodic Maintenance:- Maintenance operation of large extent required at interval of several years. It covers the renewal of wearing surface, repairing the damaged portions of side drains, repairing earth retaining wall, repairing parapet wall and railing at bridges and culverts, resealing, resurfacing etc.
D. Emergency Maintenance:- Maintenance Operation of highway generally done after 10 years. Any unfavorable conditions rising before this period is known as emergency maintenance. Thus emergency maintenance are divided into two categories.
i) Reinstatement of road after critical period is over by reconstruction of the pavement, the structure and the drainage as the case may be.
ii) Urgent emergency maintenance works needed for reopening the road construction of temporary diversion to allow the traffic to pass around the obstruction such as landslides, road washout etc

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