Recently I attended a webinar and posted this question, but, may be because of many questions posted before, my turn did not come.
From information on net, it is understood that this virus can be active for upto 72 hours on different carriers / surfaces.
May be if these are coming in contact with rain water and then if it splashes because of vehicles passing over the pools of water, we can get affected.
Like, aerosols can be a source, this form of transmission too may be possible.