APPENDIX A

APPENDIX A. SUMMARY OF SURVEY RESPONSES

Table 35. Ratings of the importance of ATIS subsystems in supporting overall ATIS objectives.

Ratings by 43 respondents for private vehicle applications:
ATIS Subsystem	Mean Rating	Lower 95% CI	Upper 95% CI
IRANS	94.9	91.7	98.1
IMSIS	58.5	50.5	66.5
ISIS	50.0	41.4	58.6
IVSAWS	68.3	59.9	76.7
Ratings by 17 respondents with a commercial vehicle operations focus:
IRANS	97.6	94.4	100.8
IMSIS	51.2	35.9	66.5
ISIS	62.2	48.4	76.0
IVSAWS	70.0	57.3	82.7

Table 36. Ratings of the importance of IVHS objectives in meeting the overall ATIS objectives.

Ratings by 43 respondents for private vehicle applications:
Performance Objective	Mean Rating	Lower 95% CI	Upper 95% CI
Traffic Congestion	81.7	74.7	88.7
Safety	80.3	72.7	87.9
Mobility	80.0	70.5	89.7
Environment & Energy	59.7	50.3	69.1
Economic Productivity	57.8	48.0	67.6
Ratings by 17 respondents with a commercial vehicle operations focus:
Traffic Congestion	71.4	53.3	89.5
Safety	83.4	70.7	96.1
Mobility	64.9	40.5	89.3
Environment & Energy	44.5	24.6	64.4
Economic Productivity	96.4	90.5	102.3

Table 37. Ratings of the importance of ATIS subsystems in meeting the objective of decreased traffic congestion.

Ratings by 43 respondents for private vehicle applications:
ATIS Subsystem	Mean Rating	Lower 95% CI	Upper 95% CI
IRANS	96.1	92.5	99.7
IMSIS	52.8	43.4	62.2
ISIS	45.3	36.1	54.5
IVSAWS	56.8	47.6	66.0
Ratings by 17 respondents with a commercial vehicle operations focus:
IRANS	94.9	89.2	100.6
IMSIS	43.8	30.7	56.9
ISIS	49.4	33.0	65.8
IVSAWS	66.4	52.1	80.7

Table 38. Ratings of the importance of ATIS subsystems in meeting the objective of improved safety.

Ratings by 43 respondents for private vehicle applications:
ATIS Subsystem	Mean Rating	Lower 95% CI	Upper 95% CI
IRANS	66.2	57.2	75.2
IMSIS	34.9	26.9	42.9
ISIS	65.5	55.9	75.1
IVSAWS	89.9	83.3	96.5
Ratings by 17 respondents with a commercial vehicle operations focus:
IRANS	74.9	63.6	86.2
IMSIS	36.8	24.8	48.8
ISIS	69.4	52.2	86.6
IVSAWS	92.4	84.0	100.8

Table 39. Ratings of the importance of ATIS subsystems in meeting the objective of increased and higher quality mobility.

Ratings by 43 respondents for private vehicle applications:
ATIS Subsystem	Mean Rating	Lower 95% CI	Upper 95% CI
IRANS	97.0	94.6	99.4
IMSIS	75.5	67.7	83.3
ISIS	52.8	43.2	62.4
IVSAWS	49.3	40.3	58.3
Ratings by 17 respondents with a commercial vehicle operations focus:
IRANS	92.9	82.5	103.3
IMSIS	48.8	32.0	65.6
ISIS	62.5	46.4	78.6
IVSAWS	58.8	45.2	72.4

Table 40. Ratings of the importance of ATIS subsystems in meeting the objective of improved environmental quality and energy efficiency.

Ratings by 43 respondents for private vehicle applications:
ATIS Subsystem	Mean Rating	Lower 95% CI	Upper 95% CI
IRANS	97.2	93.6	100.8
IMSIS	52.9	43.3	62.5
ISIS	40.1	31.7	48.5
IVSAWS	40.4	31.2	49.6
Ratings by 17 respondents with a commercial vehicle operations focus:
IRANS	92.3	82.8	101.8
IMSIS	43.8	27.3	60.3
ISIS	49.8	33.0	66.6
IVSAWS	57.9	44.5	71.3

Table 41. Ratings of the importance of ATIS subsystems in meeting the objective of improved economic productivity.

Ratings by 43 respondents for private vehicle applications:
ATIS Subsystem	Mean Rating	Lower 95% CI	Upper 95% CI
IRANS	94.4	89.6	99.2
IMSIS	71.9	63.5	80.3
ISIS	41.1	32.1	50.1
IVSAWS	46.2	37.4	55.0
Ratings by 17 respondents with a commercial vehicle operations focus:
IRANS	94.0	85.1	102.9
IMSIS	61.8	45.3	78.3
ISIS	45.7	30.4	61.0
IVSAWS	63.5	48.2	78.8