An intersection has a three-phase signal with the movements allowed in each phase and corresponding analysis and saturation flow rates shown in the table below.(1) Calculate the sum of the flow ratios for the critical lane groups.(2) calculate the minimum cycle length and the effective green time for each phase (balancing v/c for the critical lane groups). Assume the lost time is 4 seconds per phase and a critical intersection v/c of 0.90 is desired. **Table 7.6: Data for Problem 7.1**This table presents traffic flow data for different phases at an intersection.- **Phase 1:** - **Allowed Movements:** NB L, SB L - **Analysis Flow Rate:** 330, 365 vehicles per hour - **Saturation Flow Rate:** 1700, 1750 vehicles per hour- **Phase 2:** - **Allowed Movements:** NB T/R, SB T/R - **Analysis Flow Rate:** 1125, 1075 vehicles per hour - **Saturation Flow Rate:** 3400, 3300 vehicles per hour- **Phase 3:** - **Allowed Movements:** EB L, WB L; EB T/R, WB T/R - **Analysis Flow Rate:** 110, 80 vehicles per hour; 250, 285 vehicles per hour - **Saturation Flow Rate:** 650, 600 vehicles per hour; 1750, 1800 vehicles per hour**Key:**- **NB**: Northbound- **SB**: Southbound- **EB**: Eastbound- **WB**: Westbound- **L**: Left- **T/R**: Through/Right

The phase comprises the green interval, followed by a change interval and a clearance interval. For…

Answered: An intersection has a three-phase…

Structural Analysis

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ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

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An intersection has a three-phase signal with the movements allowed in each phase and corresponding analysis and saturation flow rates shown in the table below.

(1) Calculate the sum of the flow ratios for the critical lane groups.

(2) calculate the minimum cycle length and the effective green time for each phase (balancing v/c for the critical lane groups). Assume the lost time is 4 seconds per phase and a critical intersection v/c of 0.90 is desired.

**Table 7.6: Data for Problem 7.1**

This table presents traffic flow data for different phases at an intersection.

- **Phase 1:**
- **Allowed Movements:** NB L, SB L
- **Analysis Flow Rate:** 330, 365 vehicles per hour
- **Saturation Flow Rate:** 1700, 1750 vehicles per hour

- **Phase 2:**
- **Allowed Movements:** NB T/R, SB T/R
- **Analysis Flow Rate:** 1125, 1075 vehicles per hour
- **Saturation Flow Rate:** 3400, 3300 vehicles per hour

- **Phase 3:**
- **Allowed Movements:** EB L, WB L; EB T/R, WB T/R
- **Analysis Flow Rate:** 110, 80 vehicles per hour; 250, 285 vehicles per hour
- **Saturation Flow Rate:** 650, 600 vehicles per hour; 1750, 1800 vehicles per hour

**Key:**
- **NB**: Northbound
- **SB**: Southbound
- **EB**: Eastbound
- **WB**: Westbound
- **L**: Left
- **T/R**: Through/Right

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