But the restrictions, which were only supposed to last between 12 and 15 months, have now been running for more than two years, despite no evidence to show they are effective.
There are even questions over whether the increased congestion caused by the new speed limit may have actually increased pollution.
Motoring groups and a
former roads minister are among those now calling on National Highways
to come clean with the data or end the trials....<<<Read More>>>...