Bicycle Lane Design Calculator
Professional Cycling Infrastructure Planning Tool
NACTO Guidelines Compliant • Safety Analysis • LOS Calculations
Basic Design Parameters
Traffic & Intersection Design
Design Calculations
Minimum Lane Width:
5.0 ft
Recommended Width:
6.0 ft
Buffer Width:
3.0 ft
Total Width:
9.0 ft
Level of Service Analysis
B
Current LOS Grade
Flow Rate:
25 cyclists/min
Density:
0.8 cyc/ft²
Average Speed:
12.5 mph
Capacity Utilization:
65%
Safety Analysis
85
Safety Score (0-100)
Sight Distance:
200 ft
Conflict Points:
8
Protection Level:
High
Risk Level:
Low
Signal Timing & Clearance Intervals
4.5
Clearance Time (sec)
3.0
Yellow Time (sec)
2.0
All-Red Time (sec)
25
Min Green (sec)
Design Specifications & Standards
Geometric Standards
Minimum Radius:
25 ft
Maximum Grade:
5%
Cross Slope:
2%
Vertical Clearance:
8.5 ft
Pavement Markings
Line Width:
6 inches
Symbol Size:
6 ft
Symbol Spacing:
200 ft
Buffer Marking:
Diagonal
Design Recommendations
Compliant Design
Current design meets NACTO Urban Bikeway Design Guide standards for separated bike lanes.
Capacity Optimization
Consider widening to 7 feet for volumes exceeding 300 cyclists per hour during peak periods.
Safety Enhancement
Install physical separation barriers at intersections to reduce conflict points with motor vehicles.