After several meetings, a new specification with separate design details was drafted and distributed to the NYSDOT Regional Materials Engineers as an Engineering Instruction for Precast Concrete Paving. The EI specifies that concrete pavers in traffic situations be placed upon an 8” concrete sub-base, rather than asphalt. Pavers are also to be placed in a herringbone pattern, which offers a tighter interlock than other patterns, according to experts at the ICPI. Finally, the traffic threshold was raised to 8000AADT.