Make the right choice of solar road markers, first of all, you need to know the which is the bad products,
here are some bad products in the market you may see before:
These 2 photoes show one type of solar road markers, The problems are:
1. Thickness too high:30MM, can not resist wheels compression at all
2. Empty insdie. Easy to broken and
to admit moist atmosphere to enter. Then electronics fails accordingly.
This is another design, problems is the structure itself have sevral parts,
but assembled together with screws! Jesus! screws can stand wheels pressure?
This is another design, the top cover is glass, which is easiest material to rattel.