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Pavement Marking Demonstration Project: State of Alaska and State of Tennessee-Report to Congress

Publication Number: FHWA-HRT-09-039
Date: April 2010

Pavement Marking Demonstration Project: State of Alaska and State of Tennessee-Report to Congress

Appendix A. Crash Surrogate Study Results

Table 27 provides a coded study site matrix to be used a key for subsequent tables.

Table 27. Coded study site matrix.

Speed Limit (mi/h)	Curve Radius
	Radius ≤ 700 ft (Degree of Curvature ≥ ~8.0)		Radius ≥ 800 ft (Degree of Curvature ≤ ~7.0)
	Presence of Paved Shoulder		Presence of Paved Shoulder
	Yes	No	Yes	No
55	1	2	3	4
50	5	6	7	8

Table 28 provides the sample size for the crash surrogate study. Table 29 through table 32 provide the speed data by location, change in speed data by location, lateral position data by location, and change in lateral position data by location, respectively, for the study.

Table 28. Sample size of crash surrogate study.

Curve	Code	Comparison (C)/ Treatment (T)	Speed (mi/h)		Radius (ft)	Shoulder (Y/N)	Time of Day	Observations
Curve	Code	Comparison (C)/ Treatment (T)	Limit	Advisory	Radius (ft)	Shoulder (Y/N)	Time of Day	Before	After
1	1	T	55	30	318	N	Day	849	752
1	1	T	55	30	318	N	Night	86	82
2	1	T	55	35	539	N	Day	388	613
2	1	T	55	35	539	N	Night	44	84
3	1	C	55	35	649	N	Day	804	828
3	1	C	55	35	649	N	Night	75	83
4	1	C	55	40	663	N	Day	492	674
4	1	C	55	40	663	N	Night	66	135
5	2	T	55	30	314	Y	Day	298	810
5	2	T	55	30	314	Y	Night	76	100
6	2	C	55	35	613	Y	Day	2,770	1,031
6	2	C	55	35	613	Y	Night	199	274
7	3	T	55	30	881	N	Day	871	916
7	3	T	55	30	881	N	Night	83	56
8	3	C	55	40	1,857	N	Day	408	770
8	3	C	55	40	1,857	N	Night	43	99
9	4	T	55	N	1,171	Y	Day	904	735
9	4	T	55	N	1,171	Y	Night	84	86
10	4	T	55	45	1,250	Y	Day	890	1,050
10	4	T	55	45	1,250	Y	Night	60	97
11	4	C	55	N	1,425	Y	Day	923	790
11	4	C	55	N	1,425	Y	Night	83	94
12	5	T	35	30	406	N	Day	891	914
12	5	T	35	30	406	N	Night	72	98
13	5	T	50	40	672	N	Day	1,340	1,224
13	5	T	50	40	672	N	Night	117	102
14	5	C	45	30	460	N	Day	1,291	686
14	5	C	45	30	460	N	Night	95	193
15	5	C	35	30	511	N	Day	1,801	1,403
15	5	C	35	30	511	N	Night	116	261
16	7	T	50	40	1,193	N	Day	279	1,083
16	7	T	50	40	1,193	N	Night	113	104
17	7	C	45	30	860	N	Day	626	846
17	7	C	45	30	860	N	Night	354	211
18	8	T	45	N	1,161	Y	Day	2,065	772
18	8	T	45	N	1,161	Y	Night	247	143
19	8	C	35	N	1,650	Y	Day	1,337	1,222
19	8	C	35	N	1,650	Y	Night	129	169

Table 29. Speed data by location.

Curve	Code	Statistic	Speed by Location (ft/s)
			U		W		PC		MC
			Before	After	Before	After	Before	After	Before	After
1	1	Mean	71.6	71.5	71.9	75.4	67.4	67.6	60.2	60.1
1	1	SD	8.4	8.8	12.5	9.6	7.7	7.7	5.9	6.5
2	1*	Mean	69.7	69.8	69.9			69.1	62.8	64.5
2	1*	SD	10.1	9.4	8.6			7.9	8.7	8.8
3	2	Mean	73.7	73.8	70.8	70.9	66.4	65.9	55.9	56.3
3	2	SD	8.1	8.2	8.1	8.2	7.6	7.4	6.0	5.8
4	2	Mean	73.1	72.1	78.8	77.1	78.3	76.1	74.9	73.7
4	2	SD	7.7	9.2	8.7	9.1	8.5	8.8	8.0	8.5
5	2*	Mean	75.0	73.3	73.3		68.0		65.0	65.7
5	2*	SD	10.6	10.7	9.9		9.8		8.5	8.6
6	2*	Mean	75.4	74.2	76.5	76.4	75.2	75.7	72.8	72.8
6	2*	SD	12.5	12.5	9.5	9.7	9.2	9.3	9.2	8.9
7	3	Mean	84.4	83.5	83.5	83.2	82.7	82.3	81.0	81.7
7	3	SD	7.2	7.2	7.3	7.2	7.5	7.4	7.7	7.4
8	3	Mean	75.9	74.3		82.1	82.0	81.5	80.7	80.6
8	3	SD	17.9	17.7		9.9	9.6	9.1	9.3	9.0
9	3*	Mean	88.2	87.0	86.6	86.7	84.6	84.4	84.9	84.7
9	3*	SD	7.6	7.6	7.6	7.8	7.8	8.0	7.5	7.4
10	4	Mean	69.1	69.2	69.2	68.8	68.9	68.5	68.1	68.0
10	4	SD	7.5	7.4	8.2	8.4	8.2	8.4	8.4	8.7
11	4*	Mean	77.8	76.1	83.1	81.7	80.4	80.6	82.3
11	4*	SD	11.3	12.7	9.8	10.6	9.2	9.8	8.8
12	6	Mean	62.4		64.5	64.8	61.4	54.7	55.0	54.2
12	6	SD	9.3		8.0	9.1	7.4	6.8	5.9	6.1
13	6	Mean	75.3	74.9	77.8	77.9	74.3	76.0	72.7	72.6
13	6	SD	12.0	14.0	9.5	9.3	9.0	10.1	9.1	8.8
14	6*	Mean	75.4	76.1	72.3	76.2	71.3	73.2	64.3	65.7
14	6*	SD	8.7	8.9	7.8	7.9	6.6	6.8	6.3	6.4
15	6*	Mean	73.1	72.5	69.9	69.4		63.5	60.5	59.4
15	6*	SD	8.6	9.1	8.3	8.6	v	8.3	7.7	8.5
16	7	Mean	79.3	77.0	80.1	77.9	80.2	78.0	73.8	72.3
16	7	SD	8.6	8.7	9.0	8.7	9.0	8.6	8.5	8.1
17	7*	Mean	60.6	60.8	72.3	71.3	70.3	70.2	68.3
17	7*	SD	20.4	20.0	9.7	8.9	9.3	9.2	8.7
18	8	Mean	73.1	77.1	78.5	79.6	76.0	76.7	74.6	75.6
18	8	SD	8.8	8.9	9.7	8.8	9.5	8.7	9.2	8.1
19	8*	Mean	74.7	74.8	76.4	75.9	72.3	71.9	70.7	70.4
19	8*	SD	7.2	7.7	7.9	7.8	7.0	6.9	6.8	6.7

* Indicates a comparison study site.

Note: Blank cells indicate missing data.

Table 30. Change in speed data by location.

Curve	Code	Statistic	Change in Speed by Location (ft/s)
			W-U		PC-W		MC-PC
			Before	After	Before	After	Before	After
1	1	Mean	-1.1	3.9	-4.9	-7.8	-7.2	-7.6
1	1	SD	9.2	5.9	12.0	5.8	4.5	4.9
2	1*	Mean	.2					-4.6
2	1*	SD	6.7					5.0
3	2	Mean	-2.9	-2.9	-4.4	-5.0	-10.5	-9.6
3	2	SD	4.1	4.3	2.1	2.3	4.4	4.8
4	2	Mean	5.7	5.0	-.5	-1.0	-3.4	-2.5
4	2	SD	3.1	5.3	2.0	2.1	2.6	2.5
5	2*	Mean	-1.7		-5.3		-2.9
5	2*	SD	7.3		5.2		6.4
6	2*	Mean	1.1	2.3	-1.2	-.7	-2.5	-2.9
6	2*	SD	7.9	15.8	3.5	13.2	3.3	12.0
7	3	Mean	-.9	-.3	-.8	-.9	-1.6	-.5
7	3	SD	2.8	3.1	2.5	2.7	2.3	2.1
8	3	Mean		8.0		-.8	-1.0	-.9
8	3	SD		13.1		3.4	2.9	2.3
9	3*	Mean	-1.6	-.3	-2.0	-2.3	.2	.2
9	3*	SD	3.2	3.7	3.1	3.7	2.2	3.0
10	4	Mean	.1	-.4	-.4	-.3	-.8	-.5
10	4	SD	5.3	4.9	2.3	2.1	3.2	2.2
11	4*	Mean	5.4	5.6	-2.7	-1.1	1.9
11	4*	SD	7.3	8.0	3.9	3.7	3.5
12	6	Mean	2.1		-3.1	-10.0	-6.4	-.5
12	6	SD	10.6		3.2	8.0	8.7	3.3
13	6	Mean	2.5	3.1	-3.6	-3.7	-1.5	-.8
13	6	SD	7.7	10.2	2.8	2.5	1.8	1.7
14	6*	Mean	-3.2	.1	-.9	-2.9	-7.0	-7.5
14	6*	SD	6.5	5.5	3.5	3.0	4.4	4.5
15	6*	Mean	-3.3	-3.0		-5.9		-4.0
15	6*	SD	4.1	8.4		9.6		8.5
16	7	Mean	.8	.9	.1	.1	-6.4	-5.9
16	7	SD	4.9	4.9	2.8	2.6	4.3	3.6
17	7*	Mean	11.8	10.5	-2.0	-1.2	-2.1
17	7*	SD	18.3	17.5	3.5	3.6	3.2
18	8	Mean	4.3	2.6	-2.7	-3.0	-1.3	-1.2
18	8	SD	4.8	4.6	3.7	3.6	3.9	3.1
19	8*	Mean	1.6	1.1	-4.1	-4.1	-1.6	-1.5
19	8*	SD	3.6	4.6	4.1	3.8	2.1	2.2

* Indicates a comparison study site.

Note: Blank cells indicate missing data.

Table 31. Lateral position data by location.

Curve	Code	Statistic	Lateral Position by Location (inches)
			U		W		PC		MC
			Before	After	Before	After	Before	After	Before	After
1	1	Mean	42.2	40.4	34.5	32.5	22.1	30.1	46.2	50.2
1	1	SD	13.5	13.9	16.5	9.5	10.9	9.2	17.4	15.5
2	1*	Mean	27.7	27.4	24.7			26.5	47.6	48.3
2	1*	SD	10.3	11.1	9.5			12.0	13.8	14.1
3	2	Mean	35.8	43.4	28.1	26.1	22.3	21.7	36.2	39.1
3	2	SD	13.6	11.5	10.1	9.2	10.5	9.1	14.5	13.4
4	2	Mean	23.7		25.1	27.6	30.9	32.9	40.5	44.2
4	2	SD	12.3		11.4	11.3	10.9	11.8	14.9	15.7
5	2*	Mean	40.7	38.8	30.2		30.7		53.7	55.2
5	2*	SD	11.3	11.7	9.8		11.7		16.0	15.6
6	2*	Mean	33.4		27.5	25.4	17.1	20.5	34.0	34.3
6	2*	SD	13.2		11.6	10.9	10.9	12.0	15.0	15.3
7	3	Mean	31.1	31.0	39.6	35.9	37.3	38.9	43.6	43.0
7	3	SD	13.3	13.6	11.4	11.6	13.0	13.9	13.9	14.2
8	3	Mean	30.7	30.1		40.6	46.7	41.5	56.2	54.6
8	3	SD	13.5	13.0		11.0	14.6	13.6	15.5	16.2
9	3*	Mean	43.3	41.1	42.9		37.5	34.6	49.2	45.2
9	3*	SD	10.8	10.9	11.4		11.8	13.2	13.7	14.2
10	4	Mean	31.6	30.5	28.9		28.1	25.8	29.3	28.9
10	4	SD	12.0	13.1	11.1		10.7	12.3	13.3	12.9
11	4*	Mean	37.9	36.4	33.9	30.2	26.5	32.9	34.1
11	4*	SD	13.8	15.2	10.8	11.9	11.2	12.2	12.0
12	6	Mean	37.5		39.3	35.2	18.0	26.0	43.5	51.7
12	6	SD	11.2		11.1	11.7	5.2	11.1	16.5	16.3
13	6	Mean	34.8	41.6	32.0	30.0	30.8	30.6	40.3	37.7
13	6	SD	12.7	15.2	10.8	11.4	11.9	11.8	12.8	13.1
14	6*	Mean	29.7	29.6	44.1	37.5	39.1	38.0	53.8	52.4
14	6*	SD	9.0	8.9	10.5	10.9	10.3	10.8	16.0	17.2
15	6*	Mean	32.0	6.6	45.1	23.5		41.6	38.6	43.2
15	6*	SD	12.1	11.6	14.9	13.2		12.3	13.1	15.6
16	7	Mean	38.0	37.5	31.2	34.1	23.7	23.0	38.8	38.8
16	7	SD	13.2	12.7	12.7	11.9	11.1	10.9	12.6	13.8
17	7*	Mean	40.6	39.0	23.6	24.7	28.9	30.2	34.6
17	7*	SD	16.9	16.0	10.5	10.1	12.2	10.7	16.8
18	8	Mean	57.7	33.9	30.7	29.7	24.8	22.3	38.1	36.6
18	8	SD	22.5	11.3	11.7	9.7	11.1	9.7	13.1	12.0
19	8*	Mean	31.8	39.4	38.7	38.3	32.1	34.1	51.6	53.9
19	8*	SD	11.4	10.0	10.2	11.1	10.8	10.3	13.6	14.8

* Indicates a comparison study site.

Note: Blank cells indicate missing data.

Table 32. Change in lateral position data by location.

Curve	Code	Statistic	Change in Lateral Position by Location (inches)
			W-U		PC-W		MC-PC
			Before	After	Before	After	Before	After
1	1	Mean	-5.8	-7.9	-10.2	-2.4	24.2	20.1
1	1	SD	20.4	14.5	16.8	10.9	17.5	15.6
2	1*	Mean	-3.0					21.9
2	1*	SD	11.7					15.1
3	2	Mean	-7.7	-17.3	-5.8	-4.4	13.9	17.3
3	2	SD	14.1	12.1	6.8	6.3	14.4	13.5
4	2	Mean	1.4		5.9	5.3	9.6	11.3
4	2	SD	12.7		10.7	11.2	13.3	14.4
5	2*	Mean	-10.5		.5		23.1
5	2*	SD	12.6		10.9		15.7
6	2*	Mean	-5.9		-10.4	-5.0	16.9	13.8
6	2*	SD	14.4		12.8	15.6	13.2	18.6
7	3	Mean	8.5	4.9	-2.3	3.0	6.3	4.0
7	3	SD	14.1	13.6	12.8	13.6	13.3	14.1
8	3	Mean		10.4		1.0	9.4	13.2
8	3	SD		14.1		12.5	17.3	16.7
9	3*	Mean	-.3		-5.5		11.7	10.5
9	3*	SD	11.5		11.8		13.2	14.8
10	4	Mean	-2.7		-.8		1.2	3.2
10	4	SD	15.0		8.9		12.4	12.3
11	4*	Mean	-4.0	-6.2	-7.4	2.7	7.6
11	4*	SD	14.5	16.0	11.1	11.7	12.3
12	6	Mean	1.8		-21.3	-9.2	25.5	25.8
12	6	SD	14.6		9.8	13.3	17.5	16.1
13	6	Mean	-2.9	-11.5	-1.2	-2.0	9.5	11.2
13	6	SD	13.6	16.8	10.5	9.5	10.8	11.6
14	6*	Mean	14.3	7.9	-5.0	.6	14.7	14.5
14	6*	SD	11.9	11.3	12.4	12.3	15.8	16.4
15	6*	Mean	13.0	17.4		18.1		1.6
15	6*	SD	15.9	15.3		16.3		17.8
16	7	Mean	-6.7	-3.5	-7.6	-11.1	15.1	15.8
16	7	SD	15.5	14.6	11.8	12.2	14.0	14.1
17	7*	Mean	-17.0	-14.4	5.3	5.5	5.8
17	7*	SD	17.3	15.3	12.2	9.7	16.0
18	8	Mean	-27.5	-4.2	-6.0	-7.4	13.4	14.3
18	8	SD	21.5	11.7	12.0	10.1	13.4	12.8
19	8*	Mean	6.8	-1.1	-6.6	-4.3	19.6	19.9
19	8*	SD	15.1	10.8	14.9	11.1	13.0	13.9

* Indicates a comparison study site.

Note: Blank cells indicate missing data.

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Topics: research, safety, roadside, pavement marking
Keywords: research, safety, Acrylic waterborne paint, Durability, Environmental impacts, Pavement markings, Retroreflectivity, State bidding procedures, Wider edge lines
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