2019 Chevy Volt, Voltech with 7.2 kW optional Charger
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GM will soon be expanding Super Cruise to 400,000 miles of High Resolution Mapped Highways.
electrek.co
According to its press release, General Motors is doubling the Super Cruise network in North America to cover over 400,000 miles of roads. Previously, the network was only mapped out against interstate highways, but it will now be available on many state and federal routes as well. Here are a couple of notable routes in the expansion:
This might be what we saw in that Email for the Hummer for additional Super Cruise enhancements.

GM to expand its Super Cruise network, adding hundreds of thousands of miles of 'hands-free' roads
General Motors (GM) has announced a massive expansion to its Super Cruise hands-free driver assistance network. The expansion will double...
According to its press release, General Motors is doubling the Super Cruise network in North America to cover over 400,000 miles of roads. Previously, the network was only mapped out against interstate highways, but it will now be available on many state and federal routes as well. Here are a couple of notable routes in the expansion:
- US Route 66 (The Mother Road)
- CA Route 1 (Pacific Coast Highway)
- US Route 1 (Overseas Highway)
- Trans-Canada Highway
This might be what we saw in that Email for the Hummer for additional Super Cruise enhancements.