CEE 372 Transportation Engineering
Lecture 6 Horizontal Alignment
R = radius, usually measured to the
centerline of the road, in ft,
= central angle of the curve in degrees,
PC = point of curve (the beginning point
of the horizontal curve),
PI = point of
2.8
Given:
W = 2600 lb
L = 84" = 7 ft
h = 20" = 1.67 ft
lf = 30" = 2.5 ft
nd = 0.85
r = 14" = 1.167 ft
0 = 7
Me = 6 ne 0.045 n2
e
= 0.75
V=0
Find: Determine maximum acceleration of car from rest
Finding Fmax :
Fmax =
W (lf frl h)/ L
1 h/L
frl = 0.01 (1
TRANSPORTATION
ENGINEERING
HOMEWORK # 5
Solution
Problem 5.1
Given:
A single lane of traffic
Average Headway = 3.2s
Average Spacing = 165 ft
Required: Flow, average speed, and density of the traffic stream
Solution:
q = 1/(3.2 sec/veh) = 0.31 veh/sec
q =
CEE 372 Transportation Engineering, Homework 7: Learning NEXTA/DTALite Tool
Problem 1: How many nodes are in the West Jordan network? How many zones are in the
West Jordan network?
-There are 149 nodes and 41 zones in the West Jordan network.
You can coun
CEE 372 Transportation Engineering Sample Solution to Midterm II
1. On a two-lane road with 12-ft lanes, a horizontal curve is designed for 50 mi/h with a
superelevation of 10%. The PI of the curve is at 220+48 and the PC is at station 216+74.
Determine t
Problem 5.8:
Given:
Headways are exponentially distributed; 65% of headways are 9 seconds or greater
30 second time intervals;
Required: The probability of having exactly 4 vehicles during an interval.
Solution: Step 1:
;
Step 2: Solve for q = 172.3 veh/h
CEE 341 Fluid Mechanics for Civil Engineers
Chapter 4: Fluids in Motion
4.1.
Description of fluid motions
Streamline is an instantaneous visualization of the entire flow
field, i.e. a snapshot of all fluid particles at a given time. Velocity
vectors are e
CEE 341 Fluid Mechanics for Civil Engineers
Spring 2015
Chapter 6: Momentum Equation
6.1. Derivation
Continuity is physically equivalent to the conservation of mass of a closed system. In this chapter,
we will discuss the conservation of momentum. As mome
CEE 341 Fluid Mechanics for Civil Engineers
Chapter 2: Fluid Properties
2.1
Preliminaries: system & properties
Physical system is a portion of the physical universe of which we are interested for analysis.
Surroundings are the rest of the universe exterio
CEE 341 Fluid Mechanics for Civil Engineers
Chapter 3: Fluid Statics
3.1.
Pressure
Pressure is defined as normal force per unit area as
Fn d Fn magnitude of normal force
= lim = =
p
A 0 A
dA
area of action
N
Unit of pressure = = Pa
[ p]
m2
Standard atmosp
CEE 341 Fluid Mechanics for Civil Engineers
Chapter 5: Continuity Equation
5.1.
Lagrangian & Eulerian Approach and Control Volume
Lagrangian approach: follows a particle along its pathline (trajectory) using a moving frame.
Eulerian approach: uses a fixed
Sean Noel
CEE 372
Homework No. 1
9/8/14
Problem no.1
P. 1
Given: Information regarding the classification of various roads in rural and urban areas.
Origin: SSEBEs new building: College Avenue Commons, 660 S College Ave, Tempe, AZ 85281
Destination: ADOT
CEE 384 - 70698 Numerical Methods for Engineers
School of Sustainability and The Built Environment
Fall 2014
Arizona State University
Dr. Yingyan Lou
Summary
Lecture 01 Introduction
Topics Covered
1. What are numerical methods?
Procedures or algorithms t
WELCOME TO
CEE 384 NUMERICAL METHODS
FOR ENGINEERS
8/25/2014
Numerical Methods for Engineers
PEOPLE
Instructor
Teaching
Assistant
Mr. Hossein Jalali
Email: hjalali@asu.edu
2
Dr. Yingyan Lou
Arizona State University
Dr. Yingyan Lou
Office: CAVC 476
Tel:
Lecture 7 Traffic Stream Models
Chapter 5, Part II
Basic Traffic Stream Models
Example 5.2:
Given: Average vehicle time headways = 2.5 s/veh, average spacing = 200 ft/vehicle (61m/veh)
To find: average speed of traffic.
Step 1: q=
(veh/hour)
Step 2: k =
(
CEE 372: Transportation Engineering : 2.2: Tractive Effort and Resistance
Aerodynamic:
Ra = C D A f V 2
2
Grade (gravitational) resistance:
; Rolling resistance:
R g = W sin g
,
Rrl =f rl W
Handout Chapter 2
(09/10/2014)
V
f rl = 0.011 +
147
;
; Horsepo
V22 = V12 + 2ad
CEE 372: Transportation Engineering
Lecture 4: Breaking
and Stop Distance
Chapter 2
Road Vehicle Performance > Stopping Distance
A. Principle of Breaking
1. Breaking force distribution
Fb + frl*w = ma Ra + W sin (g)
Where Fb = Fbf + Fbr q
Lecture 5: Highway Design - Vertical Curve Fundamentals
Handout Chapter 3
Highway Design - Vertical Curve Fundamentals
equal tangent
Crest for
G1<0; G2>0
Sag
G2<0; G2>0
x
y
PVC
c
0
c
PVI=PVC+L/2
c+|G1|* L/2
L/2
c-|G1| *L/2
x
0
L/2
Elevation y
General form
CEE 372: Transportation Engineering : 2.2: Tractive Effort and Resistance
Handout Chapter 2
(09/08/2014)
F ma Ra Rrl Rg
Three driving conditions: related to different time-dependent power, speed,
acceleration, distance curves (I) acceleration: a > 0,
Rrl
Lecture 7 Queueing Theory
Chapter 5.5
Queuing Theory D/D/1
: interarrival time; : mean arrival rate = 1/E[]; s : service time per job; : mean service rate
per server = 1/E[s]; n : number of jobs in the system(queue length) = nq+ns;
Example 5.7: Vehicles
CE 372: Transportation Engineering
Chapter 7
A. Definitions:
1. Type of Operation
Pre-timed
Constant traffic demand
High pedestrian volumes
Allow for different cycles during the day
Semi-actuated
Green for major street
Detectors at minor streets
F
CE 372: Transportation Engineering
Chapter 6
Highway Capacity and LOS Analysis Freeways
Figure. Overview of operational analysis methodology for basic freeway segments [from HCM 2010]
1
CE 372: Transportation Engineering
Chapter 6
Definitions
a. Analysis
Queuing Analysis at Freeway Bottleneck
Assume a collision occurs at 10:30 PM on the westbound of a 4-lane bridge
(2-lane in each direction) blocking the entire roadway. When the accident
happens, the traffic volume is around 1200 veh/hr. Emergency crew
re
CEE 384 - 70698 Numerical Methods for Engineers
School of Sustainability and The Built Environment
Fall 2014
Arizona State University
Dr. Yingyan Lou
Summary
Lecture 02 Errors
Topics Covered
1. Sources of errors
Model
Measurement
Round-off (inherent in nu