In this paper,an attribute value with a fuzzy interval number was given in order to investigate the effects of "human being","automobile"and"road"on the traffic security of a high way,an evaluation system is set up,and a judging matrix is formed by AHP.

N-L Formula of Fuzzy valued Functions on the Fuzzy Number Interval [  ,];

First we give a formula which transforms interval-valued intuitionistic fuzzy number into interval,then a new method for deciding objective weights is given based on possibility degree,and a new method based on possibility degree is given to get the priorities of alternatives.

With respect to interval-valued intuitionistic fuzzy multiple attribute decision making problems with preference information on alternatives and incomplete weight information,some operational laws of interval-valued intuitionistic fuzzy numbers,score function and accuracy function of interval-valued intuitionistic fuzzy numbers are introduced.

For multi-criterion decision-making problems with incomplete information,in which the criterion s value and criterion s weights are interval grey fuzzy numbers,a grey fuzzy multi-criterion decision making approach is proposed.