Bad road surface on new off-ramp?

[vsonix]

Recently the M5 intersection with the A303/Honiton Road has been revamped ( here - but this is how it used to look). The whole area has been resurfaced and looks lovely, however I have noticed it takes way more effort and pressure on the brakes to decelerate than it would normally. The first time I noticed this I was in the e46 330d, and the second I was coming in my e36 328i, both cars I drive regularly, well maintained, no issues with braking under normal circumstances etc etc. On neither occasion was I travelling excessively fast (60-ish when joining offramp), and the weather was dry on both occasions so I am wondering why I had to push the pedal to near emergency-stop levels to come to a stop in time. I couldn't see any loose shingle or oil or anything that could cause traction loss. Could it be the road surface at fault? If I am having trouble stopping in my vehicles, surely that doesn't bode well for others?

[bennett346]

Sometimes get a layer of filth/dust/oily residue from when the road is being constructed that doesn't wear off for a couple of week. That's my guess.

Either that or it's the crap quality cheap stuff they're fond of laying down now, though i can't see them choosing that for a slipway.

[Red Devil]

Temporary low adhesion has long been a known feature of newly resurfaced roads. All newly laid bituminous surfacings have slightly lower skid resistance levels compared with those obtained a few months after re-surfacing due to the binder film coating the stone. A common result is for dry road stopping distances to seem akin to those in heavy rain.

If the contractor gets the composition wrong excess bitumen leaches out which exacerbates the situation. In some cases, the only solution is to start again - http://www.burnham-on-sea.com/news/2012/church-st-...