• Traffic Signal Management

  • Millimeter Wave Radar

  • Multi-Gig Automotive Ethernet

  • C-V2X

Intelligent Traffic Signal Management

Sumitomo Electric has been providing the traffic control system to the world's largest Traffic Control Center of the Tokyo Metropolitan Police Department since the late 1960s. We have traffic engineers with extensive signal timing knowledge. Our Intelligent Traffic Signal Management utilizes the input from this team of experienced engineers and a substantial amount of high-resolution probe vehicle data to help the municipal, state, regional, and national agencies manage the traffic signal systems more efficiently.

Key Technology: Intersection Traffic Condition Monitoring

Leverages the high-resolution probe vehicle data to monitor the traffic conditions of the entire target area and automatically extract intersections that require signal timing adjustments. There is no need for expensive infrastructure sensors or time-consuming and labor-intensive traffic surveys.

Key Technology: Optimal Signal Retiming Plan

Analyzes the traffic conditions of the target intersections in detail and automatically creates the optimal signal retiming plan to eliminate traffic congestion. No need for knowledge of advanced traffic engineering.

Technology Validation

The above key technologies have been tested and validated in Tokyo, Japan. Please see the following reference papers for details. A field operational test of traffic signal control using probe information in Bangkok, Thailand is planned to take place in 2022.

Traffic Signal Control Parameter Calculation Using Probe Data
T Yoshioka, H Sakakibara, R Tenhagen, S Lorkowski & T Oguchi
International Journal of Intelligent Transportation Systems Research 20, 288-298 (2022)

Detection of Congested Intersections Using Car-Probe Data
S Matsumoto, H Sakakibara, Y Nagashima, T Yoshioka & S Nishimura
Sumitomo Electric Technical Review, Number 94 (2022)

Radar for Detecting Pedestrians

Pedestrian detectors are optimized for roadside modules and were installed on existing poles and arms. They use V2X radio to warn drivers. These detectors have been in use since 2017 in 5 prefectures in Japan.


  • Not affected by changes of weather and day/night
  • Large cover area (40 m x 9 m)
  • High accuracy


  • Transmits 24 GHz radio waves and analyzes reflected waves
  • Distinguished Antenna Design
  • Dedicated algorithm for roadside modules

V2X Solution with Detectors

Driving safety support systems have been operating in Japan since 2015.


Informs signal changes

Supports left turns

Informs if a car is approaching rapidly

Helps prevent blind spot accidents

V2X Solution with Detectors

Newly developed radar detectors for pedestrians and vehicles. Adopting our antenna and logic technologies on our low cost platform. (76 GHz band)


  • Small size and cost effective
  • Optimized coverage area
  • High accuracy
24-GHz band 76-GHz band
Target Pedestrians Vehicles and pedestrians
Resolution 1 m 0.3 m
Antenna Larger Smaller
Status Available (operating in Japan) Under development
Features of radars Not affected by changes of weather and day/night
Features of our product Large coverage area (installed on existing poles and arms) to identify pedestrians and vehicles

Multi-Gig Automotive Ethernet Products with Automotive PHYs

Sumitomo Electric is developing Multi-Gig Ethernet connectivity products with automotive PHYs. This is targeted at In-Vehicle Networks that will enable new levels of autonomous driving.

Cellular Vehicle-to-Everything (C-V2X)

C-V2X is an expected solution for safety and efficiency in road environments by Vehicle-to-Vehicle (V2V), Vehicle-to-Infrastructure (V2I) and Vehicle-to-Pedestrian (V2P) communication. Sumitomo Electric evaluates C-V2X units in our testbed and public roads in Japan.


Frequency 5.8 ~ 5.9 GHz
TX Power 23 dBm
Antenna Diversity (RX)
Power 12 V DC

Engineering sample

Connected Vehicle Experiment

Connected vehicle technology has the potential to significantly prevent or reduce the impact of millions of accidents. Sumitomo Electric has been testing in some scenarios to confirm the advantages of connected vehicles while collaborating with external partners in the real environment.