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With the evolution of technology and sudden growth in the number of smart vehicles, traditional VANETs face several technical challenges in deployment and management due to less flexibility, scalability, poor connectivity, and inadequate intelligence. Cloud computing is considered a way to satisfy these requirements in VANETs. However, next\u2010generation VANETs will have special requirements of autonomous vehicles with high mobility, low latency, real\u2010time applications, and connectivity, which may not be resolved by conventional cloud computing. Hence, merging of fog computing with the conventional cloud for VANETs is discussed as a potential solution for several issues in current and future VANETs. In addition, fog computing can be enhanced by integrating Software\u2010Defined Network (SDN), which provides flexibility, programmability, and global knowledge of the network. We present two example scenarios for timely dissemination of safety messages in future VANETs based on fog and a combination of fog and SDN. We also explained the issues that need to be resolved for the deployment of three different cloud\u2010based approaches.<\/jats:p>","DOI":"10.1155\/2018\/5603518","type":"journal-article","created":{"date-parts":[[2018,5,2]],"date-time":"2018-05-02T23:36:38Z","timestamp":1525304198000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":123,"title":["Challenges of Future VANET and Cloud\u2010Based Approaches"],"prefix":"10.1155","volume":"2018","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3719-7295","authenticated-orcid":false,"given":"Rakesh","family":"Shrestha","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7878-4453","authenticated-orcid":false,"given":"Rojeena","family":"Bajracharya","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8249-4742","authenticated-orcid":false,"given":"Seung Yeob","family":"Nam","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2018,5,2]]},"reference":[{"key":"e_1_2_10_1_2","unstructured":"Intelligent transport systems (ITS) Framework for public mobile networks in cooperative its (c-its)s April2012 European Telecommunications Standards Institute (ETSI) Palo Alto Calif USA."},{"key":"e_1_2_10_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.comcom.2009.12.010"},{"key":"e_1_2_10_3_2","doi-asserted-by":"publisher","DOI":"10.1109\/jcn.2013.000034"},{"key":"e_1_2_10_4_2","doi-asserted-by":"publisher","DOI":"10.1109\/SURV.2010.033010.00024"},{"key":"e_1_2_10_5_2","doi-asserted-by":"publisher","DOI":"10.1002\/9780470740637"},{"key":"e_1_2_10_6_2","doi-asserted-by":"publisher","DOI":"10.1109\/JSYST.2015.2448714"},{"key":"e_1_2_10_7_2","first-page":"1","article-title":"Modeling and evaluation of lte in intelligent transportation systems. dissertation","author":"Trichias K.","year":"2011","journal-title":"IEEE Systems Journal"},{"key":"e_1_2_10_8_2","doi-asserted-by":"crossref","unstructured":"SivarajR. 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