The 1944 National Airport Plan was the first plan made by the US government for the national air travel network. It was designed to connect population centres, fulfil military needs, and allow for refuelling stops on longer routes. It also aimed to serve more densely populated areas with a smaller number of larger facilities. The linked page has a high-resolution map image and a CSV version of the Plan.
The 1947 National Highway Plan followed the Federal Aid Highway Act of 1944 and became the model for the US interstate highway system. It aimed to connect major cities with direct routes where possible, to fulfil military needs, and to connect the US at its borders with major routes in Canada and Mexico. The linked page has a high-resolution map image and a shapefile of the Plan.
The US air network is heavily concentrated in major hubs such as Atlanta, Chicago, and the three airports in the New York City area. Most large urban centres are well connected and several have a wide range of international connections. The linked page has maps that show the development of the network from 1990 to 2020.
The Norwegian government allows municipalities to impose a residency requirement or boplikt on property owners, to prevent local decline due to housing being held as mostly vacant seasonal homes. The policy was introduced in 1974 and the set of municipalities that had the policy in place has varied since then. The linked page has maps showing which municipalities applied the policy at 5-year intervals from 1975 to 2015.
The railways in Australia, and the state of South Australia in particular, were built in several different gauges and the gauge has never been unified. The linked page has maps that illustrate the development of the railway network in South Australia by gauge since its inception in 1856 and a line shapefile of the network over the same period.