9 Existing Research: An Example 9:009:009:019:019:029:039:039:039:049:059:069:079:08 w1 T 12 W3 w4 15 w7 75 5 Wi(1, 6) Each taxi can move one unit distance per minute 012345678X Dr= 2min and dw=10min1 2 3 4 5 1 2 3 4 5 0 X Y 6 7 8 6 7 8 Existing Research: An Example 𝒘𝟏(𝟏,𝟔) 𝒘𝟏 𝑫𝒓 = 𝟐min and 𝑫𝒘 = 𝟏𝟎min Each taxi can move one unit distance per minute 9