HARRISON COUNTY, TX (KLTV) - A traffic jam on Interstate 20 in Harrison County Saturday afternoon was caused by an overturned house. Just after 1:00 p.m. authorities say a mobile home traveling on I-20 near Loop 281 became unstable and flipped over into the median. An 18-wheeler traveling behind the home swerved to avoid it and also ran into the median. Traffic was at a crawl for hours while the accident was cleaned up. No one was injured.