Less open to the elements now.[1] The lorries now ride Eurotunnel in cars with a solid roof and steel truss sides. The roof is to prevent projecting objects suc

Less open to the elements now.[1] The lorries now ride Eurotunnel in cars with a solid roof and steel truss sides. The roof is to prevent projecting objects such as antennas from contacting the overhead power line (that's happened) and the open sides are to allow fire extinguishing (that's happened, more than once.) Such are the practical problems of a "rolling highway" Eurotunnel has had to solve. [1] https://www.youtube.com/watch?v=X8r0kjJvvIY https://www.youtube.com/watch?v=X8r0kjJvvIY