An Intermunicipal Development Plan (IDP) is a planning document required between adjacent municipalities to coordinate land use along their shared boundaries. In provinces like Alberta, neighbouring communities must create IDPs addressing how border areas will develop, preventing conflicts over incompatible land uses. The plan typically covers topics like future annexation, transportation connections, environmental protection, and service provision. IDPs help ensure that one municipality's development decisions don't negatively impact its neighbour. Regular reviews and updates keep the plan relevant as communities grow and change.