8.0-magnitude Wenchuan Quake occurred on May 12th

2008.The quake hit Sichuan

Ganshu

Shanxi and some other provinces

which has caused destructive losses in more than 10 affected counties.The crucial problem for related government departments is how to mitigate the disaster’s effects to the casualties and economic losses in the affected areas

and to decrease the dangers caused by the secondary disasters.Continuous landslides and collapses have buried roads.The main roads connected to the outside were blocked severely

and threatened by potential disasters in the aftershocks.It was difficult to reopen of the lifeline

and to reconstruct for relief and rescue.Blocked roads became a major obstacle for the rescue of the disaster areas.Transportation access must be restored as soon as possible.The important point is to know the degree and the spots of the damaged of roads in the first time.Remote sensing technique can be used due to its features of objectivity

real-time and macro-scope view.It can provide a rapid and effective approach for monitoring the secondary disasters

dynamic monitoring its evolution process

and evaluating the damages.For example

the information about situation of roads

bridges and other road subsidiary infrastructures can be extracted.For monitoring the disaster damage to transportation airborne remote sensing was used in the previous studies of 1966 Xingtai Quake

Haicheng Quake in 1975

Tangshan Quake in 1976 and Lancang-Gengma Quake in 1988 in China.Satellite remote sensing technique was used in Nantou Quake in 1999 in Taiwan

and Jiashi Quake in 2003 in Xinjiang.This paper presents the method

workflow and results of highway damage monitoring and assessment for Wenchuan Quake based on remote sensing and its information integration

the workflow

and results.The study area includes the highways in ten counties affected severely by the quake.First

some interpretation keys are summarized for the damaged highway and their damaged causes.Next

some damage information extraction methods are tested

such as human-computer interactive interpretation

pixel based classification（supervised classification and unsupervised classification）

and object-orientation segmentation and classification have been tested.Then

the paper presents the integration way for basic information of roads with disaster information in WebGIS system

named"3 Dimension Geographical Information System for the disaster situation of Wenchuan Quake"

realizing the visualization of the disaster situation using DEM

damage spots and highway map in Quake zone.Finally

analyse the whole situation for the monitoring area.The results reveals that there are 63 spots damaged by landslides

3 spots by mudslides

190 spots by collapses

6 spots by quake lakes

5 spots of bridges broken.According to Beijing-1 images and other sources

Yingxiu-Maoxian section of the national highway

Maoxian-Beichuan section of Provincial Road 302

Yingxiu-Wolong section of Provincial Road 303

and Anxian-Qingchuan section of Provincial Road 105

are seated the in the south-west end of Longmenshan fault zone

and these roads are parallel to Longmenshan hillside fault zone.The damaged roads are mostly consistent with the fault zone.In conclusion

remote sensing can monitor and assessment of damage caused by the earthquake

and it can provide the important information to related government departments

and also play a more important role in reconstruction for the decision-makers.It should be improved and developed in the following aspects:（1）to built the basic integrated database is needed;（2） to enhance the ability to integrate multi-sources data;（3） to promote the standard for transportation emergency response;（4） to develop information extraction technique for earthquake damage;（5） to develop a united platform for transportation emergency response.