Deserted Freeway

How many time have we waited for the traffic to disappear so that we can take a photograph of a highway without vehicles? In fact we may never find a time where there are no vehicles around.
So how to photograph the highway without showing the distracting vehicles?
Here is a tutorial on how to do this, making a busy highway look like it is deserted and lonely, without showing the vehicles

see: http://blog.djustified.com/2011/10/deserted-freeway-ep-211-digital.html