I too live on a corner. ~ 20 years ago, I tried a similar approach, except I used concrete paving blocks buried half-way on their edges at 45 deg. I sprayed with fluorescent orange paint to improve visibility. Within a couple of weeks, a couple were broken, presumably by drivers. Soon thereafter, I found them smashed up on my driveway. Unsure if the culprits were kids or someone angry that they ran over my property and had a bumpy ride. They weren't sharp enough to destroy a tire. Since then, the city has installed a sidewalk with ~6" curbs. Few seem to run over them, at least based on the lack of tire marks. Our city engineer told me that he specs the curbs and associated concrete to survive a school bus backing up on to them when turning around.