The phrase "an infrastructure of around" is correct and usable in written English.
It can be used when discussing the approximate size, scale, or extent of an infrastructure project or system.
Example: "The city is planning to develop an infrastructure of around 500 miles of new roads to improve transportation."
Alternatives: "a network of approximately" or "a system of about".
"Interest in new music flags when you don't have an infrastructure of informers around you".
Christine Quinn, the City Council speaker, said recently, at Barnard College, "I want to leave it as a tool in police officers' toolboxes," but she noted, "We need to put an infrastructure of reform around stop-and-frisk".
The strategic plan and vision has been built around developing an infrastructure of high-quality physicians with support staff and the multidisciplinary team approach to cancer care.
Finally, early planning is required to realise the construction of a transport infrastructure with a length of around 450 km before 2020.
It therefore makes sense to incorporate the creation of an infrastructure around breastfeeding as part of health care reform.
Our nation faces epidemics of obesity, breast cancer, diabetes, and cardiovascular disease that could be partially mitigated by the funding of an infrastructure around breastfeeding.
Even though Google has built up a relatively sophisticated infrastructure of services around its search product (which plenty of critics argue has created another kind of closed loop), it has never abandoned the foundational element of its business: openness.
Powered by ubiquitous smartphone location tracking technology and fueled by nobody wanting to stand out in the rain waiting for that one taxi that's not already taken, Uber erupted volcanically into the popular consciousness and quickly became a vital part of the informal infrastructure of cities around the world.
HIV/AIDS continues to exact a massive toll on the health, economics and political infrastructure of communities around the world.
According to Société Générale, in 2010 China spent more than US$1 trillion on construction (including residential and non residential real estate, and infrastructure), representing around 20% of its nominal GDP - almost twice the world average.
