EDHEC has been gathering data from asset owners to produce indices that address the specific needs of the infrastructure asset class. It has sought to address two major issues: one, infrastructure assets are often large and heterogeneous, meaning you need to include a lot of assets before you can start to represent the market in its entirety; two, infrastructure assets are rarely traded, making it challenging to assess market pricing accurately and in a timely manner.
EDHECinfra Global Unlisted Infrastructure Index is mentioned by IPE Real Assets.