paulsharvey
Elite Member
On driveway width, 12 ft, With 4 ft of clear "shoulder" on each side will readily accomade any vehicle around (some emergency services require 16 ft clear space), if the driver can drive. Make your turning radius nice and large, avoid sharp turns.
The 4 ft shoulder should slope away from the driving surface if possible. This does multiple things; it gives you a total of 20ft of clear area, enough for two vehicles to slow and pass each other; it keeps roots and veg from encouraging, it allows you to mow the shoulders, it allows a semi to get in, and it gives an area to control water flow.
Culverts, if needed, completely skip 4", 6", and 8". If it needs a culvert, start at 15". Make them Longer than you think. IE, extend 8 ft beyond the road bed on both sides. At the frontage road, large radius are your friend; 25 ft radius, gives you swing room.
For the base, you want to strip the organics, and any pumping clays. Compact, and then place the base material. 6" of good compacted base is better than 12" of dumped poorly done base.
The 4 ft shoulder should slope away from the driving surface if possible. This does multiple things; it gives you a total of 20ft of clear area, enough for two vehicles to slow and pass each other; it keeps roots and veg from encouraging, it allows you to mow the shoulders, it allows a semi to get in, and it gives an area to control water flow.
Culverts, if needed, completely skip 4", 6", and 8". If it needs a culvert, start at 15". Make them Longer than you think. IE, extend 8 ft beyond the road bed on both sides. At the frontage road, large radius are your friend; 25 ft radius, gives you swing room.
For the base, you want to strip the organics, and any pumping clays. Compact, and then place the base material. 6" of good compacted base is better than 12" of dumped poorly done base.