1, 2 & 3. Swap Contractors, Matamata's biggest company with quarries, contracting, and transport operations all over the Waikato
4. Waharoa Transport, another local transport company, DAF XF. The H in the yellow rectangle means that the truck is a HMPV (High Productivity Motor Vehicle) operating on defined routes at a weight over the normal 44 ton (97,000lb), 20m (65.5') limit. From the axle configuration I would say it is the most common HPMV configuration called 50Max, 50 tons (110,250lb), at 25m (82') long. HPMV trucks can run up to 64 tons (141,000lb), but only on a limited number of routes.