Left Lane Must Turn Left Sign Reflective sheeting on heavy duty aluminum So if your streets are

So if your streets are 60 mph and you need to put up new speed limit signs or replace older signs at their end of their lifespan

drivers won't know it

If you see a Speed Limit 55 sign posted

Other speed limit choices: 05  10  15  20  25  30  35  40  45  50  55  60  65  70

5 mph is too slow

Left Lane Must Turn Left Sign Reflective sheeting on heavy duty aluminum So if your streets areSize: 30x30 We make all our signs from . 080 thick aluminum. Other companies use steel which rusts, plastic which cracks or warps, or a thinner gauge aluminum (. 060 or . 040) which bends or buckles. Material Details We use 3M reflective sheeting and 3M UV resistant inks. 3M offers the following on their sheeting: 3M 3400 Series Engineer Grade Prismatic (EGP): Rated for 5 7 year outdoor lifespan 3M 3930 Series High Intensity Prismatic (HIP):