New Delhi, July 21 -- Speeding up of express trains, including Rajdhani and Shatabdi Express services, is a constant endeavour and Railways has always been committed to provide better speed and safety features in its trains. The speed of trains operating on Railways, including those of Rajdhani and Shatabdi Express services are dependent inter-alia on factors such as maximum permissible speed of the section, type of coaches, capacity utilisation of sections en-route, signalling and interlocking systems. At present, all the Rajdhani and Shatabdi Express services are being operated at the maximum permissible speeds of the sections en-route, official sources here said. In its drive to provide more comfortable and safer journeys to the traveli...