As the of the people who recieve the materna taxi passengers let me assure you that not only did they ring the hospital maternity department first for advice, and were told to wait at home and then make thier own way in. That secondly once they have reached us no midwife or obstetrician can convince them that they are not about to deliver the baby any minute now. Only when on average 10 or more hours have elapsed will they admit it wont be happening "any time now".