Communication-Based Train Control (CBTC) network is an automated control network for railways that ensures the safe operation of rail vehicles using data communications. CBTC networks have stringent requirements for communication availability and latency. Wireless Local Area Network (WLAN) is a popular choice in CBTC networks due to the available commercial-off-the-shelf WLAN equipments. However, handoffs in WLANs may result in communication interruption and long latency in WLANs-based CBTC networks. In this paper, the authors propose a handoff management scheme for CBTC networks using Stream Control Transmission Protocol (SCTP) and IEEE 802.11p WLANs to provide high communication availability and low latency in CBTC networks.