Canada In Canada, the provinces adopt the use of APWA Uniform Color Codes. For more information, see the section below for the United States. India India uses a convention similar to the US, for marking underground utilities such as telephone, gas, water and electricity. The system is based entirely on convention without any written standard. These markings are color-coded, and are painted by contractors onto the pavement.  United States Utility markings In the United States , the American Public Works Association (APWA) Uniform Color Codes for temporary marking of underground utilities are listed below :
 India India uses a convention similar to the US, for marking underground utilities such as telephone, gas, water and electricity. The system is based entirely on convention without any written standard. These markings are color-coded, and are painted by contractors onto the pavement. Canada United States Utility markings Canada and the United States use the American Public Works Association (APWA) Uniform Color Codes for temporary marking of underground utilities :
D
Canada In Canada, the provinces adopt the use of APWA Uniform Color Codes. For more information, see the section below for the United States.
A
Canada
R
In
Canada and
R
,
use
D
are listed below