The article (and bee) talk about "bridges, roads, and other physical structures required for the smooth functioning of society." But when one looks under the hood of TOLLX/TOLSX, it isn't bridges, roads, railroads, airports, etc. that one sees there.
It seems to me there are two very broad and loosely defined areas covered by infrastructure. One is the bridges, roads, etc. - which might be covered by industrial/transportation companies. I tend to think of these as companies that help move people and goods. The other is energy (or more broadly natural resources) infrastructure. (Where would one put communications - cell towers, cables/fiber lines, etc.?)
A good description of the latter comes from the PGBAX prospectus: Energy infrastructure companies are engaged in the transportation, storage, processing, refining, marketing, exploration, production, or mining of any mineral or natural resource. ... [The] mid-stream energy infrastructure market ... is ... mostly crude oil and refined products pipeline, storage, and terminal assets; natural gas gathering and transportation pipelines, processing, and storage facilities; propane distributors; energy commodity marine transportation (including liquefied natural gas transportation and processing) ..."
Think Keystone - TransCanada Corp (TRP) - that's 5% of TOLLX. If this is the kind of infrastructure you have in mind, that's fine. But it's not building bridges (except indirectly, as all construction requires energy, natural resources). A fund that seems more intent on balancing both sides of the infrastructure equation is Lazard Global Listed Infrastructure (GLFOX).
Its top holdings are: 8% Atlantia (ATL), a company involved in road infrastructure (operating, maintaining), 8% Fraport AG (FRA), owns/operates Frankfurt airport), 5% DUET (DUE), energy distribution systems, 5% Tokyo Gas, .... At #9 (4%) is Norfolk Southern (railroad). But these are mostly foreign companies, and this fund will keep at least 40% of its investments outside the US. So the fund may serve more as an example of one that holds bridge/road/RR companies than as one that might take advantage of a US infrastructure renewal (depending on whether foreign companies are involved in those projects).
The subject of this thread says it all - look under the hood.