Vehicular Fog Computing (VFC) is expected to be a fruitful candidate of the Intelligent Transportation Systems (ITS) in terms of bringing improved safety and efficiency solutions. However, the cost of deploying large-scale testbeds for the industrial VFC is prohibitively huge. Therefore, a dynamically connected simulation framework is required to evaluate the performance of such solutions before their actual deployment. Such framework dynamically joins a traffic simulator with a network simulator. However, the ability of a cooperative framework to evolve with the upcoming versions of simulators can not be fully ensured. Hence, there is an utmost requirement for a bidirectional-coupled framework that can be embedded in the network simulator. It should also be capable to evolve with the future versions of the coupled simulators. We have developed a framework for VFC that fulfills these requirements.