How to calculate time of travel between 2 cities?
<p>I have following task: to calculate time of travel between 2 cities using any api or services. But I haven't made it before, and I have 2 ideas: calculate time using speed limit on roads or trafic flow. Are there means to help me with my task? May be Google Maps are able to help me? Thank you, anyway.</p>

<p>Additional: I don't have a speed of transport. </p>
