Grades

Question 1

what does the speed of a vehicle on grades depend on

Answer 1

power/weight ratio

Question 2

when might problems occur with grades

Answer 2

when proportion of heavy vehichles is high
speed difference is high
flow rate is high

Question 3

how do you avoid problems due to heavy traffic on grades

Answer 3

install a climb lane
start it when change in speeds are low continue until low again. enure good SSD
or install slow vehicle bay

Question 4

what does ESD stand for

Answer 4

establishment dight distance (sight required to encourage 70 % of drivers)

Question 5

what is CSD

Answer 5

continuation sight distance -critical distance that will allow driver to complete or abondon procedure

Question 6

equation for probability that there is sufficient gap in oncoming flow

Answer 6

p=e^(-oncoming flow x required time gap)

Question 7

equation for probability to overtake

Answer 7

P(sightdistance) x P(gap)