Select a Calculator
Choose a tool below to solve your calculation fast, then jump directly into standards lookup or exam prep.
1. Work Zone Taper Calculator
Calculate merging, shifting, and shoulder taper length using speed and lane width with automatic formula selection.
2. Advance Warning Sign Calculator
Check minimum A, B, and C sign spacing for urban or rural conditions and validate proposed site spacing.
3. Sight Distance (SSD/DSD/ISD)
Handle stopping, decision, and intersection sight distances, including truck-related time gap logic.
4. Traffic Signal Timing
Estimate yellow interval, red clearance, pedestrian minimum green time, and Webster-based optimal cycle length.
5. Dilemma Zone Calculator
Visualize dilemma zone limits in front of the stop line using approach speed and intersection conditions.
6. Delineator Spacing Tool
Compute delineator spacing by curve radius and connect roadway geometry with visual guidance decisions.
7. Chevron Spacing Calculator
Determine chevron alignment sign spacing based on curve radius and calculate required advisory speed plaques.
8. Unit Converter
Convert transportation-specific units (mph ↔ ft/s, length, volume, density) essential for engineering calculations.
9. Speed Study Analyzer
Paste your raw spot speed frequency data to instantly calculate the 85th Percentile Speed and the 10 mph Pace speed.
10. MUTCD Search Tool
Quickly find highly relevant MUTCD content using keywords or plain-language questions.