Just as a heads up, how you mix the Glyphosate can make a real difference in it's effects. I did some driveway spraying and some wood trail spraying this year with it. First time in the woods I did a lighter mix, waited the week or two to see how it went...didn't do a ton, but did some. Takes sunlight to really make this stuff activate tbh. Second time I did it, I did around my gravel driveway. I mixed a tiny bit heavier and went at it. With the full sun, and heavier mix it spread and ran down hills underground etc... so I have a few spots of lawn that are dead, that I didn't spray. They are slowly coming back...but it will be the end of the year if not next spring until it looks okay IMO.
1) Sunny areas help the poison work through the plant faster.
2) It can run underground a bit if you go heavy so be careful if you are around things you care about
3) It takes a bit to work, don't expect overnight results. Sometimes can be a week or two, depending on mix strength.
Good luck, wear long sleeve clothes/breathing mask and gloves and do not spray in the wind!!!! Before I get back in the house I strip to my underwear and its right to the wash on heavy duty. Don't want the animals licking at me when I get in and get some in them.