This is copy from a Facebook post put out yesterday by Scott Lundy, forwarded by Arran Shearer.
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CAUTION: Decker from PCH all the way into westlake has new lines painted on the road. There's a reflective sand product they used that is literally the slipperiest substance I have ever seen, and it's building up in the corners. Riders have already crashed this morning because of it, so please be careful until it gets washed away.
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From the Facebook post response, there have been a number of crashes due to this substance being on the road surface all along Decker Canyon all the way into Westlake. Please take extreme caution when riding in these areas and anywhere else where line painting has occurred.

Be safe out there!

Kent Koral
(818) 802-0826