A method for wireless communication in a vehicular communication network, the method comprising: selecting, at a communication device, a frequency bandwidth via which a physical layer, PHY protocol data unit, PPDU, will be transmitted in the vehicular communication network, wherein the frequency bandwidth is selected from a set of permissible frequency bandwidths that includes a 10 MHz bandwidth and a 20 MHz bandwidth; selecting, at the communication device, a downclocking ratio of 1⁄2 for generating the PPDU; generating, at the communication device, the PPDU i) according to the selected downclocking ratio of 1⁄2, and ii) based on an orthogonal frequency division multiplexing, OFDM, numerology defined by the IEEE 802.11ac Standard, wherein the PPDU is generated to span the selected frequency bandwidth and to include a PHY preamble having a legacy preamble portion and a non-legacy preamble portion; and wherein: when the selected frequency bandwidth is 10 MHz, the PPDU is generated according to the downclocking ratio of 1⁄2 and based on the OFDM numerology defined by the IEEE 802.11ac Standard for 20 MHz PPDUs, and when the selected frequency bandwidth is 20 MHz, the PPDU is generated according to the downclocking ratio of 1⁄2 and based on the OFDM numerology defined by the IEEE 802.11ac Standard for 40 MHz PPDUs; and transmitting, by the communication device, the PPDU in the vehicular communication network. selecting, at a communication device, a frequency bandwidth via which a physical layer, PHY protocol data unit, PPDU, will be transmitted in the vehicular communication network, wherein the frequency bandwidth is selected from a set of permissible frequency bandwidths that includes a 10 MHz bandwidth and a 20 MHz bandwidth; selecting, at the communication device, a downclocking ratio of 1⁄2 for generating the PPDU; generating, at the communication device, the PPDU i) according to the selected downclocking ratio of 1⁄2, and ii) based on an orthogonal frequency division multiplexing, OFDM, numerology defined by the IEEE 802.11ac Standard, wherein the PPDU is generated to span the selected frequency bandwidth and to include a PHY preamble having a legacy preamble portion and a non-legacy preamble portion; and wherein: when the selected frequency bandwidth is 10 MHz, the PPDU is generated according to the downclocking ratio of 1⁄2 and based on the OFDM numerology defined by the IEEE 802.11ac Standard for 20 MHz PPDUs, and when the selected frequency bandwidth is 20 MHz, the PPDU is generated according to the downclocking ratio of 1⁄2 and based on the OFDM numerology defined by the IEEE 802.11ac Standard for 40 MHz PPDUs; and transmitting, by the communication device, the PPDU in the vehicular communication network. when the selected frequency bandwidth is 10 MHz, the PPDU is generated according to the downclocking ratio of 1⁄2 and based on the OFDM numerology defined by the IEEE 802.11ac Standard for 20 MHz PPDUs, and when the selected frequency bandwidth is 20 MHz, the PPDU is generated according to the downclocking ratio of 1⁄2 and based on the OFDM numerology defined by the IEEE 802.11ac Standard for 40 MHz PPDUs; and transmitting, by the communication device, the PPDU in the vehicular communication network.