How can we divid the error in level bitween many benchmarks in road for example?& how many methods can used for that?

well ... when you use level in Surveying the Road u going to plan , you aint forced to know how it gonna be , your job is simple & you just need to get levels of Right & center line & left of the drawn road , then when u finish , the Architect would get the levels you took , then make his calculations by Autocad or Civil Programs & ask you back to set out the fitting levels for it ... so in short words your method is just a calculator Guy ;)

level traverse should be made it should undern go through  arthamatic check after if it fall under         access sable  then we can distribute the error with relevant with distances.

only one method to divide the error in level between many benchmarks in road