To be more exact, I use the factor of 0.138, which is 1 ft. on HO scale, thats:
1 ft /87.1 ft HO scale = 0.01148 ft
0.01148 X 12 in = 0.137773, or rounded = 0.138
So, for example, 8 ft. X 0.138 = 1.104 or 1.1 inch in HO. The difference between 1.1" and 1.125" doesn't seem like much, but when you get into tens or hundreds of scale feet it throws everything way off.
Good information. Thanks
The standard modern rural highway (both freeway and conventional) for rebuilt or new constuction is 12' lanes with 8' to 10' paved shoulders but the standard is not always adheared to.
County roads are now when built or rebuilt often to the same standard but a lightly traveled road would still often be narrower.
Look at roads in the area to be modeled. Aerials and street views (Bing or Google) are very useful. Many roads have not been widened since built.
Old oil company often indicate road surface (unpaved, gravel, paved). For instance much of US Highway 50 in California and Nevada was gravel until sometime after World War 2.
A lady I worked with grew up in a small mid-Western town. The paved highway did not run through town. The town streets were paved, but the main road from the Highway to the town was gravel in the 1960's
I tried to sell my two cents worth, but no one would give me a plug nickel for it.
I don't have a leg to stand on.
Roger Hensley= ECI Railroad - http://madisonrails.railfan.net/eci/eci_new.html == Railroads of Madison County - http://madisonrails.railfan.net/ =