Google, Lyft, Delphi, General Motors- all the pioneers in driverless cars have urged Congress to push for uniform national rules on autonomous vehicles. A patchwork of state laws, governing the operation of self driving cars, is threatening to stall their development. US senators have reportedly initiated consideration of a national standard for robotic vehicles.

Executives of the three pioneering companies have urged lawmakers to impose rules on issues such as dashboard controls and lane markings. The rules will facilitate driverless cars moving easily across the state borders. The executive calls have been made through the testimony submitted ahead of a Capitol Hill hearing on Tuesday, according to a report published in the Financial Times.

53 pieces of legislation have reportedly been introduced in 23 states across the US affecting driverless cars during the past two years. In December, California has released draft rules specifically prohibiting fully autonomous vehicles. Chris Urmson, Google's director of self-driving cars predicts, operating self driving cars across state boundaries will face limbo in absence of unified approach.

However, Senator Gray Peters, a Michigan Democrat considers promulgation of uniform rules across the country as absolutely critical. Patchwork of the state regulations will slow down the development process while adding confusion and advancement of these technologies, reports Bloomberg while covering an interview with the Democrat senator.