Thank you for any help with this. My setting is England in early 1930's, and my character will be driving from London to a small village in Essex. I have determined that an average highway-cruising speed for his type of car would have been 40 mph, and that the distance from London W1 to the general area of the village is about 68 miles (about 1.5 hours) on modern roads at modern highway speeds.
I am uncertain how much extra time should be allowed for the road conditions/routes/populated areas of the period. I do not need a very tight timetable, but it is good to know whether it would be a 2 hour trip or a 4 hour trip, for example.
I have Googled "scenic routes" and "b roads" for the cities, as well as variations of "road conditions britain 1930's" and "driving england 1930's" but I don't seem to be getting much. Thanks!