first , why you dont directly animate with 3ds ?

second , read the help for maxscript , they explain everything about animation controllers and other features .

main thing must be known :: an animation is a compositing of three major domains : Translation+ Rotation+Size (scale)

each domain has many algorithms , such as Bezier or TCB or seperate XYZ algorithm .

and each algorithm has its own caller in maxscript . read the help , it helps you a lot .

third , there is a plugin , i think it is called " something_behavior " ((((( something = the word i forgot ! ))))),this plug is made to simulate the traffic of many interacting objects ( people traffic , traffic jam and street transpassing , ... )