Lecture II, Thurs, Feb1, 2018// lecture 2 on moodle, all the powerpoint to page 77

Question 1

Exam question: what are the vehicle characteristics

Answer 1

1-Static characteristics: Weight and size of vehicle
2-Kinematic characteristics: Motion of vehicle without considering forces causing motion
3-Dynamic characteristics: Considering forces causing motion

Question 2

Kinematic characteristics of interest are

Answer 2

the acceleration and deceleration capabilities of the vehicle

Question 3

Acceleration is important for

Answer 3

Passing maneuvers
Gap acceptance ( whether u want to cross an intersection)
Design of Freeway ramps

Question 4

Without braking, a vehicle will decelerate

when driver releases gas pedal, due to

Answer 4

aerodynamic forces

Question 5

What is AASHTO

Answer 5

American association for state highway and transportation officials

Question 6

Static Characteristics

Answer 6

Size of design vehicle determines design
standards for:
– Lane and shoulder width
– Length of vertical curves
– Turning radii (at low speed)

Question 7

Any road should have the design of single unit trucks

Answer 7

true

Question 8

Dynamic Characteristics

Answer 8

• Tractive effort and resistance

* Braking force

Question 9

Why Is It Important to Study

Braking?

Answer 9

• Stopping sight distance
• Roadway surface design
• Accident avoidance systems

Question 10

Stopping sight Distance

Answer 10

distance traveled during P-R time + braking distance

Question 11

the road is “inclined” towards
the center of the curve to provide an
additional force

Answer 11

True

Question 12

The roadway inclination is called the

Answer 12

superelevation

Question 13

In superelevation we name it cross slopes not grades

Answer 13

True

Question 14

We do cross slopes of how much for drainage

Answer 14

2%

Question 15

You still have Rv

Answer 15

it is on the slides of lecture 2 from slide 67 to 77, there is an example on it to solve.