The default overall rating posted on the Auto Transport Reviews is based on the average rating over the last two years
of reviews for a company. This is a simple average: The sum of the stars of the reviews for two-years divided by the
count of the number of reviews for two-years. The average is then rounded to the nearest whole number.
The reason we use only the last two years of data is that this gives our visitors a snapshot into where the company is in recent history, or at least a two-year period. Over two years companies can improve or worsen and Transport Reviews will reflect this. This means well rated companies always need to be diligent to maintain a high level of service. It also means that poorly rated companies can always improve.
Some reports on the site show ratings based on 30-days and one year of data. This should be specified on the report. These reports can also help gain insight into the current level of service a company is offering.