Principle

Advantage

Disadvantage

Undedicated Mobile Phones

1) Relies on acceleration

2) Energy Efficient

3) Measures speed, congestion

1) Accelerometer measurements prone to inaccuracies, erroneous data

2) Depends on multiple cellular service providers for location detection

Anonymized Signaling

1) Active and Idle handsets

2) Energy Efficient

3) Large sample size

4) Measures average speeds

1) Vehicle passing boundaries of cell sites with a traffic junction them, encounter green or red phase, which introduces error

2) Depends on multiple cellular service providers for location detection

Traffic flow prediction

1) Simulator on history data

2) Real time data submitted to get prediction results

1) Implementation not in real time

COTraMS

1) Employs IEEE networks

2) Energy Efficient

1) Requires RSU installed on road side making it operationally challenging

2) Requires IEEE 802.11 infrastructure

SBTM (Spatiotemporal Traffic Bottleneck Mining)

1) Identifies traffic bottlenecks

2) Location based services

3) Accuracy of Prediction > (Congestion converge OR Congestion drop)

1) Depends on multiple cellular service providers for location detection

2) Not in real time

Localized Handling Network Event Systems (LocHNESs)

1) Accepts fixed as well as GPS enabled sensor

1) Large datasets

2) Computation intensive

3) Dependence on multiple data agency

AFRC

1) Network of Controllers communicate

2) Compute congestion levels

3) Disseminates information to traffic junction ahead

1) Physical installation of controller

2) Data acquisition from roadside sensor is a challenging hardware issue

Real Time System

1) GPS Sensors

2) Real time system

1) No inroad sensors

2) No latency

3) Accurate