The Supreme Court has summoned transport secretaries of several States for not filing responses to PIL on installing speed governors in public transport vehicles.<br/><br/>The court has expressed anguish over non-filing of responses by States which have already been served with the notice of the PIL.<br/><br/>The apex court also asked the transport secretaries of States like Delhi and Bihar to appear in person with relevant records on the next date of hearing of the PIL.<br/><br/>The bench was hearing a PIL on the issue of installation of speed governors in public transport vehicles.