http://www.ukmotorwayarchive.org/

I had forgotten about this site above, for those of us who have constructed a few of these it is a nice trip down memory lane. In those days the testing consultant was appointed by the client and under the control of the consulting engineer. Staff for the summer was the staff for the winter, difficult to find work for ten techs in the middle of winter. In the 70′s and up to the middle 80′s there was no computers either, so no  reports could be complied. We had to do the end of contract reports calculating standard deviations …