Summary: Trials of different cross section 'roadways' for SRN6. Run No 9 (29.5.69) up to run No 102 (9.6.69). Mostly LSs of SRN6 heading down hoverway towards camera. Bulldozers and scrapers at work on hoverway. Reel 2 has section of SRN6 being placed back on track after falling off.