south jordan oval-about

Trevor Briggs, David Clark, Daniel Miller, Jeff Sadler 

South Jordan Oval-About

BCMSENGINEERING

Problem

• A unique traffic feature near a busy commercial center in South Jordan is experiencing congestion.

S

Problem

Current Performance Problems Objectives• Assess current level of

service• Estimate time until failure• Present mitigation

alternatives • Costs-benefit analysis

Level of Service   A-B  C  D  E-F

S

Analysis

Traffic Counts Data Processing

M

Analysis

Synchro Modeling and Analysis

• Large delays on north and southbound approaches• Insufficient gap lengths on 11400 South

B

Mitigations

• Speed Bumps

• Turning-lane Addition

• Traffic Metering

BC

Cost-Benefit Analysis

MitigationAlternative

Approximate Cost

Benefit 

Queue  Delay Delay/Vehicle Fuel Reduction

Speed Bump $6000 9% 4% 16% 2%Turn Lane  $105,035 17% 22% 62% 9%Metering $338,180  20% 32% 74% 7%

Costs are based on present value.Benefits are measured as improvement compared to the “do nothing” alternative based on 2040 traffic volumes.

C

Recommendations

• Short-term: turning-lane addition• Long-term: traffic signals

M