A joint sealing boot comprises a first end affixable to a shaft, and a second end affixable to a boot cover, the second end having a sealing area including at least one sealing bead for sealing the joint and preventing grease egress and contamination ingress. The ACC system further includes a prediction system for predicting a conflict situation in which the controlled target distance cannot be maintained, in which case the take-over request is initiated before the conflict situation actually occurs. The AP is provided in an ingress or egress region of the first wireless network, where it receives RF signals from one or more communication devices and determines and sets wireless transceiver parameters for adjusting boundaries of its RF coverage region. The challenge request is encrypted with a private key of a pair of cryptographic keys. The polyolefin additive may have a crystallinity greater than the crystallinity of the propylene-based polymer.