Another shiny new guardrail, another quick park n grab.
You are looking for a small lock n lock container, located at the posted coordinates. Inside you will find a logbook and a stamp. Please do not remove the stamp from the cache, as it is not a trade item. You will need to bring your own writing instrument to sign the logbook, and supply your own inkpad if you wish to use the stamp.
Please make sure you are pulled well off the road. The north side of the road has a wider shoulder and is recommended for parking.