The unknown method of setting up rainwater grates

There are sinking and damaged manhole covers and rainwater grates everywhere on the roads, causing passers-by to fall into wells from time to time. In order to manage the roadside manhole covers and personal safety, how should we set up the rainwater grate? Please see the two methods introduced below:
Vertical installation: Set the rainwater grate to the edge of the roadside stone and place it vertically , integrated with the side stone. The setting requirements are generally for traffic lanes of more than 1 meter, with one set symmetrically set up on both sides of the road every meter.
. Set up in the green belt: recess the side stones on both sides of the road into the green belt to form a harbor shape. Set the rainwater grate flat to the inside. The setting requirements are generally for traffic lanes of more than 1 meter, with one set symmetrically set up on both sides of the road every meter.