Vehicular Terrorism Prevention Act of 2018 (Sec. 2) This bill directs the Department of Homeland Security (DHS): (1) to assess the activities that DHS is undertaking to support emergency response providers and the private sector to prevent, mitigate, and respond to the threat of vehicular terrorism; and (2) based on such assessment, to develop and submit to the congressional homeland security committees a strategy to improve its efforts to support such providers and the private sector in that regard. The strategy shall include: an examination of the current threat of vehicular terrorism; methods to improve DHS information sharing activities with such providers and the private sector regarding best practices to prevent, mitigate, and respond to the increasing threat of vehicular terrorism; and training activities that DHS can provide for such providers to prevent and respond to such threat.