LTN - location table number

number with the value 0 to 63 used to identify the Location Table used by the service provider
NOTE 1: The LTN is generally allocated to each service provider in a country by the relevant government or roads authority from a range assigned to that country. It is transmitted in type 3A groups.
NOTE 2: Value 0, when transmitted in type 3A groups, shows that the service provider is encrypting the location codes.

Application Area: Traffic and Travel Information