Since the 1970s, many countries have to strengthen the conservation road work as an important technology policy, the rapid increase in the conservation of the total investment proportion of investment in roads, some have been much higher than the investment for construction. Permanent International Association of Road Conference (PIARC) Technical Committee set up conservation in 1979, the past few years, he held a meeting to study conservation issues. In 1983 in Sydney held its 17th World Road Meeting.
Data show that, as of 2012, the national road maintenance mileage of 4.1168 million kilometers, an increase of 3.43%, the national road maintenance mileage total mileage accounts for the proportion of 97.2%, up 0.3 percentage points over the previous year. In the "build support on behalf of" the concept of rule era, road maintenance is placed in a secondary position, only 78% coverage of the 2006 National Conservation highway; conservation issues with insufficient exposure, the idea gradually to the road management " construction and Maintenance of both "approach, in one fell swoop track maintenance ratio rose to 97.2% in 2012, all road maintenance time has come.
However, over the past few years, road maintenance is more cover change "quantity", and the lack of "quality" of the increase, mostly minor repairs and the lack of deep conservation. Of the total funds for road maintenance is about 801.1 billion yuan, only 16.4% over the same period the new highway investment during the "Eleventh Five-Year", not only far lower than developed countries in the post-curing period, lower than other development in Brazil, Mexico, etc. countries, conservation and long-term investment has a huge upside.
"Twelve Five" period, the cumulative long-term focus on the outbreak of the conservation needs of the road management ideas Forced to "conservation first" conversion, large-area applications, overhaul and maintenance and other pre-deep conservation will force conservation investment to accelerate upward.
