In the body text of articles, the first occurrence of a term to be abbreviated should be spelt out in full with the abbreviation to be used in the rest of the article following immediately afterwards in parentheses.
An exception to this rule are those abbreviations and formats listed here and at Wikitravel:Currency, Wikitravel:Time and date formats and Wikitravel:Measurements
Abbreviations should be uniform and consistent and generally should not include full stops or periods.
In prose, do not use an ampersand (&) instead of spelling out "and" in full.
Using abbreviations is especially encouraged in listings.
Editors may want to choose the appropriate abbreviation from those below which are both widely understood and unambiguous. However, don't knock yourself out "correcting" Rt to Rte - there is more important work to be done in plunging forward and writing an up-to-date and accurate free Travel Guide!
Expatriate (noun and adjective): expat
For example (from the latin phrase exempli gratia): eg
In other words (from the latin phrase id est = that is): ie