The new cameras were to start operating in warning mode from July 10, 2010, according to a story featured in the Blayney Chronicle on April 22 of that year.

If erected, the cameras would have targeted speeding heavy vehicle drivers by measuring the amount of time it takes them to drive between two points with a calculation then used to determine their average speed.

"If the vehicle's average speed is higher than the speed limit for the length of road, the driver will be booked for speeding," an RTA spokesperson said in 2010.

Now, less than two years later, a spokesperson from the O'Farrell government's recently established Transport for NSW organisation says the cameras will not be installed.

"A community member raised concerns that the location of the cameras would have an adverse road safety impact on traffic movement into and out of their family property," the spokesperson said.

"As a result of community concern about the proposed location of point-to-point infrastructure on the Mid Western Highway, Roads and Maritime Services (RMS) carried out an assessment of alternate locations.

"The assessment determined that there were no other suitable locations for the placement of infrastructure to conduct point-to-point enforcement on the Mid Western Highway."

The spokesperson said it was then decided to relocate the point-to-point enforcement to an alternative location on the Newell Highway between Forbes and West Wyalong.

This will "deliver greater road safety benefits because of a more significant crash history on this section of the Newell Highway", according to the spokesperson.

The spokesperson refused to explain why Blayney Shire residents were not previously publicly informed of the RMS' decision to not install the cameras.