The current maximum address (Street Address) length is only 60 characters. This is simply not enough. For example, addresses for prisoners often far exceed this length, foreign countries like Taiwan and Mexico usually have long descriptive addresses. There shouldn't be any reason why this value couldn't be 255 characters. Currently to get around this limitation I internally truncate the street address when submitting to Authorize.net API while keeping the full address for our own records. This is obviously not ideal and should be fixed.