With Bridgegate and the now-fatal underfunding of New Jersey Transit dominating the headlines, it’s easy to forget about other botched infrastructure projects in the Garden State. Take the Port Authority’s incredibly mismanaged and ill-designed trucks replacement program, for example: Launched in 2009, it offered drivers grants to help pay for new, cleaner vehicles — up to $25,000 each. Most drivers make less than $30,000 a year; for many, especially those driving rigs with the older, dirtier-burning engines that the program meant to phase out, it was too good a deal to pass up. But the grant program was at best cosmetic. A new truck costs as much as $100,000; many drivers went into serious debt to cover the upfront capital, some ending up as much as $75,000 in the hole. To minimize the debt burden, the only alternative for many was to purchase trucks that were already years old, with unfamiliar emissions systems needing specialists to fix. Sometimes these replacements died on the side of the Jersey Turnpike.