you are colourblind.
Road construction signs are normally orange in color with black print. They warn drivers of road closings, upcoming stops, and detours.
Ranch Road
it indicate the road =way signs
Watch out for trees.
Gray
Round signs give orders, normal triangle signs give warnings and rectangular signs give useful information (the background colour of these describes the road by the way).
To My Knowledge
Folks On Spokes. It's a bike trail.
Changed road conditions
Road signs give information, warnings and instructions.
You can get road signs painted on Road Traffic Signs's website. This website allows customers to customize their own road signs and they will ship them for a charge.
In the US, road signs in blue generally denote the presence of certain facilities. Some of the better-known ones include the "food-gas-lodging" signs telling you you can obtain those things at a particular exit, and the white H on a blue background sign that denotes a hospital.