Thanks folks for your assistance. The slab does appear to be solid one on rebar (don't know about mesh) and is at least 4 inches think along the edges. I gave the ribbon of paver concept some thought last year and check it out some more. So, thanks for jogging my memory. Money is both a short and long term consideration, especially since we have must put $30k into the house this past month to get closer to level 5 drywall we paid for. My 64 year old wife fell on the slick wet driveway surface three weeks ago and now is in PT rehab, but may still need knee surgery. I'll add that PI issue to the defective construction claim against the builder, in the meantime I need come up with a quick fix to address the slick hazard. More later.
before i'd cut new control joints, i'd want to be sure the old joints hadn't yet cracked full depth as they're designed to perform,,, an alternative is sawing full-depth 2 parallel cuts, removing that portion of concrete, & installing new decorative concrete or brickwork,,, that's the path we chose when repairing another contractor's f/u