After importing my own high precision map, how do I add traffic participants?

[Mikasal]

I have generated a map with roadrunner and successfully imported apollo. How to add traffic participants?

[YuqiHuai]

@Mikasal Apollo provides a script named replay_perception and it can be used to add traffic participants https://github.com/ApolloAuto/apollo/blob/master/modules/tools/perception/replay_perception.py