ITE Journal March 2018 - 37

Sum of
Squares
Between Groups 116809
Within Groups
135987
Total
25279

df
3
291
294

Mean
Square
38936.2
467.3

F
83.32**

**p < 0.01
N

Mean

SD

99% CI

Baseline

73

22.80

21.84

(16.24, 29.36)

Temporary Install

39

81.47

14.66

(72.50, 90.45)

2015 Follow-up

32

59.18

25.40

(49.27, 69.09)

2016 Follow-up

151

64.42

22.13

(59.86, 68.98)

A one-tailed correlated-samples t-test was conducted comparing
speed at the dilemma zone in baseline against the final month of
treatment for all sites, excluding roundabouts or traffic circles.
There was a significant difference found between baseline (n = 3200,
M=28.77, SD=5.61) and treatment (n = 3200, M=25.37, SD=5.88);
t = 28.16, p = .001. The same analysis was conducted on speeds at
the crosswalk, and a significant difference found between baseline

Site
Roundabout
Roundabout East Main and
5th Street, Benton Harbor
Roundabout East Main and
Riverview, Benton Harbor
Marshall Traffic Circle,
Marshall, SE by City Hall
Marshall Traffic Circle,
Marshall, NW
Hybrid Beacon/ RRFB
Midblock RRFB Monroe St.,
Allegan
Midblock Crosswalk
Stadium Drive in Ann Arbor
North Main St. Three Rivers
E. Huron St. West of Ingalls
T Intersection
S. Westnedge and Ranney
St. Kalamazoo
Full Intersection
Nixon Rd. at Bluett Rd.
Division St. at Jefferson
Cherry at Warren
Cherry at Hollister
Wealthy at Cass
Wealthy at Henry
TOTAL

Flexible Delinators
Distroyed

Summary of One-way ANOVA: Yielding by Condition

Table 5. The number of each type of sign installed at each site along with
the number of each type of sign destroyed at each site.
Flexible Delinators
Mounted

Summary of ANOVA results for yielding:

Table 5 shows the number of each type of sign installed along
with the number of each type of sign destroyed. Generally, signs
mounted on a curb type mounting base affixed to a detachable
flexible rubber boot that support the sign panel in a vertical

Flush Mounted
Base Destroyed

A one-way analysis of variance (ANOVA) was conducted on yielding
compliance under baseline and temporary installation conditions, as
well as on 2015 and 2016 follow-up data. The results were significant,
F(3, 291) = 83.32, p = .001. Fisher-Hayter pairwise comparisons were
then calculated on each of the conditions. The baseline was significantly different from the temporary treatment (qFHobt = 23.97, p <.01),
2015 follow-up (qFHobt = 11.22, p <.01), and 2016 follow-up (qFHobt =
19.10, p <.01). Temporary installation was also significantly different
from the 2015 follow-up (qFHobt = 6.11, p <.01), and 2016 follow-up
(qFHobt = 13.62, p <.01). Finally, 2015 and 2016 follow-up data were
significantly different (qFHobt = 4.18, p <.01). These results indicate
that the gateway configuration produces substantial increases
in yielding across a variety of site characteristics, and it remains
significantly higher over time. While the temporary installations
were on average more effective than yielding obtained in follow-up,
the follow-up data include sites where constituents of the gateway
were destroyed, possibly attenuating the effect.

Sign Durability Data

Flush Mounted
Base

Statistical Analysis

(n = 3200, M=28.67, SD=5.52) and treatment (n = 3200, M=24.30,
SD=6.13); t = 35.54, p = .001. These results suggest even in the absence
of a pedestrian, the gateway configuration of in-street signs produces
marked decreases in speed in advance of, and at, the crosswalk.

Curb Mounted
Base Destroyed

At the Nixon Road crosswalks, 758 vehicles that slowed at the
crosswalk were observed and no instances of hard braking were
observed. At the S. Division crosswalk, 912 vehicles that slowed were
observed and only one instance of hard braking was observed. These
data were collected several weeks after the permanent installations.

Curb Mounted
Base

Hard Breaking

2

0

2

1

0

0

2

0

2

1

0

0

1

0

1

0

6

0

1

0

1

1

6

0

2

0

2

1

0

0

3
1
0

0
0
0

1
2
4*

0
0
0

1
4
0

0
0
0

1

0

1

1

1

1

3
2
3
3
3
6
33

0
0
0
0
0
0
0

0
0
0
0
0
0
12

0
0
0
0
0
0
5

1
1
0
0
0
0
20

0
0
0
0
0
0
1

Flush Mounted Curb Top *

w w w .i t e.or g

M arch 2018

37


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Table of Contents for the Digital Edition of ITE Journal March 2018

ITE Journal March 2018 - 1
ITE Journal March 2018 - 2
ITE Journal March 2018 - 3
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http://www.nxtbook.com/ygsreprints/ITE/ITE_December2019
http://www.nxtbook.com/ygsreprints/ITE/G110939_ITE_November2019
http://www.nxtbook.com/ygsreprints/ITE/G110110_ITE_October2019
http://www.nxtbook.com/ygsreprints/ITE/G110109_ITE_September2019
http://www.nxtbook.com/ygsreprints/ITE/G108559_ITE_August2019
http://www.nxtbook.com/ygsreprints/ITE/G108250_ITE_July2019
http://www.nxtbook.com/ygsreprints/ITE/G107225_ITE_June2019
http://www.nxtbook.com/ygsreprints/ITE/G104039_ITE_May2019
http://www.nxtbook.com/ygsreprints/ITE/G104038_ITE_April2019
http://www.nxtbook.com/ygsreprints/ITE/G104036_ITE_March2019
http://www.nxtbook.com/ygsreprints/ITE/G103582_ITE_February2019
http://www.nxtbook.com/ygsreprints/ITE/G102868_ITE_January2019
http://www.nxtbook.com/ygsreprints/ITE/G100155_ITE_December2018
http://www.nxtbook.com/ygsreprints/ITE/G100154_ITE_November2018
http://www.nxtbook.com/ygsreprints/ITE/G99495_ITE_October2018
http://www.nxtbook.com/ygsreprints/ITE/G98028_ITE_September2018
http://www.nxtbook.com/ygsreprints/ITE/G97366_ITE_August2018
http://www.nxtbook.com/ygsreprints/ITE/G96287_ITE_July2018
http://www.nxtbook.com/ygsreprints/ITE/G94315_ITE_June2018
http://www.nxtbook.com/ygsreprints/ITE/G93877_ITE_May2018
http://www.nxtbook.com/ygsreprints/ITE/G93065_ITE_Apr2018
http://www.nxtbook.com/ygsreprints/ITE/G91484_ITE_Mar2018
http://www.nxtbook.com/ygsreprints/ITE/G89434_ITE_Feb2018
http://www.nxtbook.com/ygsreprints/ITE/G86608_ITE_Jan2018
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