é¢æµç»æè [è¯å ¸] dopester; [ä¾å¥]交ééæ±é¢æµæ¯è¿è¡äº¤éè§åçåºç¡ï¼å ¶é¢æµç»æï¼ç´æ¥å½±åçå³çè 对è§åæ¹æ¡çå¶å®ã The travel demand forecast is the base of transportation planning, which directly affects the decision of policy-maker.