Delineator and Chevron Spacing

Spacing for delineators and chevrons depends on the application. However, when a driveway or intersection interrupts the selected spacing interval, the delineator or chevron should be located as close to its correct position without interfering with the driveway or intersection.
  • Horizontal Curves -
    On horizontal curves, spacing should be adjusted so that several delineators or chevrons are always visible to the driver. Tables 8-3 and 8-4 illustrate spacing for delineators and chevrons on horizontal curves as well as on approaches and departures from horizontal curves.
  • Roadside Barriers -
    When delineators are used in conjunction with roadside barriers (i.e., guardrail or bridge rail) on straight sections of roadway, the spacing should be adjusted to ensure a minimum of three delineators are used, with a maximum spacing of 100 ft between any two delineators. When the roadside barrier is located along a curved section, Table
    8-3 or 8-4
     should be used to determine the appropriate delineator spacing up to a maximum of 100 ft. Section 4 should be used for applications concerning concrete median barriers.
Other types of retroreflective devices may be used on sections of roadways with guardrail, bridge rail, or concrete barrier. See Section 4 for more information.
Table 8-3:
Suggested Spacing for Highway Delineators and Chevrons on Horizontal Curves Based on Degree of Curve
DEGREE OF CURVE
RADIUS OF CURVE, FT
DELINEATOR SPACING IN CURVE (A), FT
DELINEATOR SPACING IN STRAIGHTAWAY (2A), FT
CHEVRON SPACING IN CURVE (B), FT
1
5730
225
450
=
2
2865
160
320
=
3
1910
130
260
200
4
1433
110
220
160
5
1146
100
200
160
6
955
90
180
160
7
819
85
170
160
8
716
75
150
160
9
637
75
150
120
10
573
70
140
120
11
521
65
130
120
12
478
60
120
120
13
441
60
120
120
14
409
55
110
80
15
382
55
110
80
16
358
55
110
80
19
302
50
100
80
23
249
40
80
80
29
198
35
70
40
38
151
30
60
30
57
101
20
40
20
Table 8-4:
Suggested Spacing for Highway Delineators and Chevrons on Horizontal Curves Based on Advisory Speed
ADVISORY SPEED (MPH)
DELINEATOR SPACING IN CURVE (A), FT
DELINEATOR SPACING IN STRAIGHTAWAY (2A), FT
CHEVRON SPACING IN CURVE (B), FT
65
130
260
200
60
110
220
160
55
100
200
160
50
85
170
160
45
75
150
120
40
70
140
120
35
60
120
120
30
55
110
80
25
50
100
80
20
40
80
80
15
35
70
40