An application oriented cross-layer multi-channel(AOCM)MAC protocol was proposed for VANET. The AOCM protocol could derive the optimal control channel(CCH)interval to ensure the timely and reliable transmission of safety messages on the CCH. based on real-time statistics and prediction for different types of sages coming from upper application layer. In the service channels(SCH). https://iguanasellers.shop/product-category/holder/