Interference of two 433mhz rf devices

I'm using 433Mhz Tx and Rx pair for wireless transmission. I'm also using an encoder and decoder pair to set the address. Will another such Tx(433mhz) in the same space, with different address cause interference?

P.S. : I'm participating in a RF race event. Will mine interfere with other participants though i use my unique address. If so, how can it be prevented?

Thanks in advance

It is the interference of the same frequency. Using different code can not solve the problem.

To avoid or reduce interference.
1. Use in different time.
2. Use in different direction. (Use directional antenna)
3. Use in different sub area. (The effective range should not overlap each other)