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4.0 Geometric and Safety Design

4.5.2 Survey Results

Tables below present the project survey findings for toll island widths used to support different modes of toll collection (i.e., manual, automatic (ACM and ATIM), and dedicated ETC) for toll roads and toll bridges:.

Q0074 If a toll island is on one or both sides of the lane, what is the width of the island (feet)?
Max
Min
Mode
Average
16
2
6
7.2

Q0074 If a toll island is on one or both sides of the lane, what is the width of the island (feet)?
Max
Min
Mode
Average
16
2
6
7.2

Q0134 What is the width of the toll island on which the ACM/ATIM is mounted (feet)?
Max
Min
Mode
Average
6.5
4
6
5.50


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