“infrastructure upgrade” is a correct and usable phrase in written English.
You can use it when referring to a physical upgrade of a set of related components that form a system (e.g. roads, bridges, telecommunications networks, etc.). For example: “The government has allocated funds for an infrastructure upgrade in the city.”.
A reported $45 billion was spent to get Shanghai ready, an infrastructure upgrade that included streets, airports and a modern subway system any MUNI rider would envy.
He also put a lot of political capital behind passage of a $2 billion water infrastructure upgrade and a large business franchise tax cut.
Juniper Networks, another Californian technology company, also made millions from contracts related to CN2, the internet infrastructure upgrade that enabled China's so-called Great Firewall.
The discussions underscore the difficulty Trump faces as he seeks to finance his 2016 campaign promise of a $1 trillion national infrastructure upgrade.
Smart Energy GB, the body tasked with promoting the meters, said the rollout was an essential but "hugely complex and challenging infrastructure upgrade".
For Northern, Network Rail accepts a large part of the blame for a long-delayed infrastructure upgrade – the electrification of the line past Bolton.
Further increases in capacity would require infrastructure upgrades and investment.
This year's ASTB activities include one major test campaign and infrastructure upgrades.
Mr. Cotton said private companies would provide about $2 billion of additional funding for those infrastructure upgrades.
Since 2002, the state has been paying for major infrastructure upgrades and subsidizing expansions of Camden's hospitals and universities.
Several years later, the city invested $76 million in infrastructure upgrades for the area, including the repaving of several streets.
