They placed small signs on the roads, spaced about 50 yards apart, in groups of 5 or 6. Motorists reading them would be rewarded with a somewhat humorous or philosophical ending at the fourth or fifth sign and then a reminder that it was brought to them by Burma Shave at the last sign.
Folklore has it that the campaign saved a failing company.
When reading the examples below, pause a few seconds between each line to get the same effect motorists used to enjoy. You can see more examples at the Burma Shave Slogans site.