Friday may 11, 2018 while driving westbound on two lane highway us 90, approximately 8 miles east of liberty, texas power failed. was driving 60 miles per hour, approximately, and two warning messages appeared. gearbox fault and parking brake fault. i was able to pull out of traffic lane by coasting and stop on side of road. placed vehicle in park and read the faults again. was not able to move gear selector out of park. shut off engine and restarted with foot on brake. still same fault messages alternating. unable to shift out of park with foot on brake. called land rover assistance and they suggested turning vehicle back off and then on again. no resolution after three tries. vehicle towed by flatbed wrecker to southwest land rover houston texas. wrecker driver stated this was a common problem with land rovers in general and was very helpful. at dealer the vehicle was unloaded from wrecker and no problems found. dealer did not have explanation for reason no power and could not shift out of park. no fault codes were recorded by computer. if road did not have shoulder, could have caused serous or fatal accident. many roads in houston do not have escape lanes or shoulders and speeds are in excess of 60 mph. concerned no fault codes recorded and no guarantee will not happen again.