Online Canadian Traveler Problem Xu Yinfeng Xi’an Jiaotong University Friday, April 16, 2004. 11-12, room 3464 Abstract -------- The online Canadian Traveler Problem (CTP for short) is considered for the case when the blockages occur one by one without any predictable information on the transportation net. The strategies for recoverable online CTP and irrecoverable online CTP are given and the competitive ratios of these strategies are analyzed. Some further research problems are proposed.