Realistic world version 1.6

Changelog

Version 1.1
.Added signs
.Polygon collision doesn't work to well
.Added barriers to some of gravel road

Version 1.2
.Added more signs
.Added more barriers
.Added more environment objects

Version 1.3
.Added more signs
.Added more roads
.Reworked some roads

Version 1.4
.Fixed jittery signs
.Added a VERY windy road
.Reworked some more roads

Version 1.5
.Reworked roads
.Deleted a steep road
.Changed barrier colour at the end of the road

Version 1.6
.Added support poles to part of road
.Added some corner signs

There is still LOTS of fixes to be done. I am fixing them as quick as I can.