I posted this photo on a Facebook social chat site for Roadtrek owners and the president of Roadtrek, Jim Hammill, saw it. Jim showed it to his engineers and then he told me that the engineers liked it. What fun!
The barrier to keep dogs safely inside is made from cardboard, plexiglas and strapping tape.
The dogs like the plexiglas window.
Details of the construction. The tab at the top right attaches to the front passengers seat belt which is not in use.
Click on image to see details