Roads and Maritime Services are the primary road agency in New South Wales (NSW) Australia and responsible for maintaining over 18, 000 kilometres of road network. Along the east-coast of NSW, roosting and breeding habitat for threatened microbats occurs in in a variety of Roads and Maritime assets. This includes structures such as heritage timber truss bridges, concrete pipe and box-cell concrete culverts, and concrete bridges. When these structures are removed or upgraded for maintenance or safety reasons, impacts on threatened bats such as the Large-footed Myotis (Myotis macropus) and Bent-wing bats (Miniopterus spp) can cause the extinction of local populations. To mitigate this, Roads and Maritime investigated and documented the features of known roosting and breeding habitat for threatened microbats in a variety of concrete and wooden structures within the Northern Rivers of NSW, Australia. In 2017, based on these known features, ecologists, bridge designers, biodiversity specialists, environment staff and project managers worked together to create an Australian first- the inclusion of permanent roosting and breeding habitat in the design and construction of a new concrete bridge. This presentation highlights recent innovations on road projects, lessons learned during construction of permanent roosting and breeding microbat habitat on a new concrete bridge, and provides recommendations for future standard design in concrete bridges. We report on preliminary monitoring results that demonstrate successful uptake and breeding events from the Australian first- inclusion of permanent microbat roosting and breeding habitat in a new concrete bridge. We outline the agency's emerging issue of the removal and/or maintenance of its remaining 48 heritage Timber Truss Bridges and present the latest innovative designs for permanent breeding and roosting threatened microbat habitat features into these bridges.