A volume warrant for urban stop signs:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
Saugatuck, Conn.
Eno foundation for Highway Traffic Control
1950
|
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | "Prepared...as a joint research project of the Bureau of Highway Traffic, Yale University and the Eno Foundation.". - Bibliography: p. 119 |
| Beschreibung: | 121 S. |
Internformat
MARC
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Datensatz im Suchindex
| _version_ | 1804176006642139136 |
|---|---|
| adam_text | TABLE OF CONTENTS
LIST OF FIGURES v
LIST OF TABLES vi
PREFACE 7
Chapter I — Introduction 9
Observance of Stop Signs 9
Warrants for Stop Signs 11
Scope of This Study - 12
Warrant Criteria 13
Chapter II — Method of Field Observation 15
Choice of Apparatus 15
Description of Locations 18
Intersection A: Wallace and Chapel Streets --- 18
Intersection B: Franklin and Chapel Streets --- 21
Intersection C: Orange and Willow Streets --- 21
Intersection D: Whalley and Winthrop Avenues - 21
Chapter III — Experimental Results 24
Accepted and Rejected Lags 27
Definition of Critical Lag 28
Observed Lags at the Four Intersections 29
Critical Lag Compared with Greenshield’s Time Gap’ - - 35
Reasons for Variation in Critical Lag 36
Critical Lag and Volume 36
Critical Lag and Speed 37
Critical Lag and Sight Obstructions 38
Critical Lag and Side-Street Traffic Pattern ---- 39
Critical Lag and Main-Street Width 39
Summary 40
Number of Side-Street Cars Delayed 41
Tabulation by Fifteen-Minute Periods ----- 42
Formula for Percentage of Side-Street Cars Delayed - 45
A Volume Warrant 51
The Volume Warrant 51
Application of Warrants to Intersections 52
Time Involved in Delays - - 54
Definition of Wait 54
Average Wait of First-Position Cars 55
Average Wait of All Cars 57
Problems Calling for Further Study 60
Critical Lag 61
Scatter in Experimental Results 61
Turning Movements 61
Chapter IV — Probability Theory 62
Earlier Work 62
Theory of a Single Traffic Stream 64
Difficulty of Synthesizing Two Streams 67
A New Concept: the Block 67
Antiblock Distribution 69
Block Distribution 71
Theory of the Interaction Between Two Intersecting
Traffic Streams 76
Number of Side-Street Cars Delayed 77
Pile Distribution - - 78
Position Distribution 81
Removing Assumption of Instantaneous Clearing - - 85
Time Involved in Delays 85
The Unsolved Problem 88
Chapter V — Applications of the Volume Warrant - - 90
Warrant Criterion 90
Steps in Applying the Warrant 90
Choice of Main and Side Streets ------- 90
Determination of the Critical Lag 91
Volume Counts and Warrant Graphs 93
Examples 99
Example I: Intersection A 99
Example II: Intersection B 100
Example III: Intersection C 100
Example IV: Intersection D 101
Short-Count Warrant 102
Importance of Critical Lag 104
Ratio of Volumes 103
Chapter VI — Summary and Conclusions 105
GLOSSARY 107
APPENDIX A —THE GRAPHIC TIME - RECORDER --- 109
APPENDIX B —TABLES OF FIELD DATA 112
BIBLIOGRAPHY 119
INDEX 120
LIST OF FIGURES
FIGURE PAGE
1 The Graphic Time-Recorder The Photograph Shows How
the Machine was Used Inside an Automobile --- 17
2 Picture and Plan of Intersection A 19
3 Picture and Plan of Intersection B 20
4 Picture and Plan of Intersection C 22
5 Picture and Plan of Intersection D 23
6 Sample Section of Recording Chart, Showing Measurement
of Lags, Gaps, and Waits 25
7 Distribution of Accepted and Rejected Lags at
Intersection A 31
8 Distribution of Accepted and Rejected Lags at
Intersection B „ 32
9 Distribution of Accepted and Rejected Lags at
Intersection C 34
10 Distribution of Accepted and Rejected Lags at
Intersection D 35
11 Cumulative Distribution of Main Street Speeds at
Intersections A, B, C, and D 38
12 Percentage of Side-Street Cars Delayed at
Intersection A 43
13 Percentage of Side-Street Cars Delayed at
Intersection B 44
14 Percentage of Side-Street Cars Delayed at
Intersection C 45
15 Percentage of Side-Street Cars Delayed at
Intersection D 46
16 Average Wait of First-Position Cars at
Intersection A 55
17 Average Wait of First-Position Cars at
Intersection B 56
18 Average Wait of First-Position Cars at
Intersection C 56
19 Average Wait of First-Position Cars at
Intersection D 57
20 Average Wait of All Cars at Intersection A---- 58
21 Average Wait of All Cars at Intersection B---- 59
22 Average Wait of All Cars at Intersection C---- 59
23 Average Wait of All Cars at Intersection D---- 60
24 Gaps in a Single Traffic Stream 64
25 Gaps, Blocks, and Antiblocks in a Traffic Stream --- 68
26 Cumulative Distribution of Block Sizes,
Theory vs Observation 75
FIGURE PAGE
27 Percentage of Side-Street Cars in First Position,
Theory vs Observation 83
28 Average Wait of All Cars, Theory vs Observation - - 87
29 Cumulative Distribution of Accepted and Rejected
Lags at Intersection D 93
30 Warrant Graph, for a Critical Lag of 4 6 Seconds The
Curves Show the Volumes for which 25%, 50%, and
75% of the Side-Street Cars are Delayed ---- 94
31 Warrant Graph, for a Critical Lag of 4 9 Seconds --- 95
32 Warrant Graph, for a Critical Lag of 5 2 Seconds --- 96
33 Warrant Graph, for a Critical Lag of 5 5 Seconds --- 97
34 Warrant Graph, for a Critical Lag of 5 9 Seconds --- 98
35 The Graphic Time-Recorder 110
36 Sample Section of Recording Chart, Showing Positions of
Vehicles at Intersection Ill
J*
LIST OF TABLES
TABLE PAGE
I Accepted and Rejected Lags at Intersection A--- 29
II Accepted and Rejected Lags at Intersection B--- 30
III Accepted and Rejected Lags at Intersection C--- 33
IV Relationship between Critical Lag and Other
Intersection Characteristics 41
V Observed Average Wait of All Side-Street Cars 58
VI Theoretical Number of Piles per Hour, for a
Critical Lag of 6 0 Seconds 80
VII Theoretical Number of Cars per Hour in Each Position,
for a Critical Lag of 6 0 Seconds 84
VIII Theoretical Average Wait of All Side-Street Cars,
for a Critical Lag of 6 0 Seconds 87
IX Accepted and Rejected Lags at Intersection D--- 92
X Tabulation by Fifteen-Minute Periods of Field Data at
Intersection A 112
XI Tabulation by Fifteen-Minute Periods of Field Data at
Intersection B 113
XII Tabulation by Fifteen-Minute Periods of Field Data at
Intersection C 115
XIII Tabulation by Fifteen-Minute Periods of Field Data at
|
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| building | Verbundindex |
| bvnumber | BV043415591 |
| ctrlnum | (OCoLC)636520822 (DE-599)GBV495402044 |
| format | Book |
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| id | DE-604.BV043415591 |
| illustrated | Not Illustrated |
| indexdate | 2024-07-10T07:25:19Z |
| institution | BVB |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-028833717 |
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| physical | 121 S. |
| publishDate | 1950 |
| publishDateSearch | 1950 |
| publishDateSort | 1950 |
| publisher | Eno foundation for Highway Traffic Control |
| record_format | marc |
| spelling | Raff, Morton S. Verfasser aut A volume warrant for urban stop signs Morton S. Raff Saugatuck, Conn. Eno foundation for Highway Traffic Control 1950 121 S. txt rdacontent n rdamedia nc rdacarrier "Prepared...as a joint research project of the Bureau of Highway Traffic, Yale University and the Eno Foundation.". - Bibliography: p. 119 HEBIS Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=028833717&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Raff, Morton S. A volume warrant for urban stop signs |
| title | A volume warrant for urban stop signs |
| title_auth | A volume warrant for urban stop signs |
| title_exact_search | A volume warrant for urban stop signs |
| title_full | A volume warrant for urban stop signs Morton S. Raff |
| title_fullStr | A volume warrant for urban stop signs Morton S. Raff |
| title_full_unstemmed | A volume warrant for urban stop signs Morton S. Raff |
| title_short | A volume warrant for urban stop signs |
| title_sort | a volume warrant for urban stop signs |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=028833717&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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