Google has launched an official Android beta program for its Maps application on the Play Store, making it easy for early adopters to test latest pre-release builds of the app. Those interested in joining the Google Maps beta channel can head to the Source link below. Once there, tap on the 'Become a Tester' option (make sure you're logged into your Google account). After this, just download/update the Maps app by heading to Google Play. Source
Source: http://www.gsmarena.com/google_maps_android_beta_program_goes_live_on_play_store-news-18595.php