This study evaluates the applicability and operational effects of expanding unsignalized intersection control in neighborhood-scale local street networks with closely spaced intersections, examining whether signalized intersections can be selectively converted to unsignalized operation to improve network-level performance. A virtual grid network of six intersections spaced 200 m apart was analyzed across approach volumes of 200 to 600 vehicles per hour per lane. Five operational scenarios were tested using microscopic traffic simulation in PTV VISSIM 2024, assessed by average travel speed, delay, travel time, and queue length. A real-world case study of the Gwanggyo Legal Town network in Suwon, where signalized and unsignalized intersections are mixed, was also conducted. Under the modeled network conditions, reducing the number of signalized intersections generally improved network-level performance when approach demand was 400 vehicles per hour per lane or below. At 200 vehicles per hour per lane, it achieved 49.3 km/h and 2.8 sec/veh versus 23.5 km/h and 101.3 sec/ veh under full signalization; within 200–350 vehicles per hour per lane, unsignalized operation yielded 2.1 to 4.7 times higher travel speed and up to 36 times lower delay. Consecutive placement of signalized intersections outperformed dispersed placement. In the case study, allunsignalized conversion raised travel speed by 20% and reduced delay by 13%, travel time by 27%, and queue length by 14%. Excessive signalization may degrade efficiency where intersection spacing is short (approximately 200 m) and approach volumes are at or below 400 vehicles per hour per lane. Traffic signals on local streets should be re-evaluated in terms of network-wide performance, but any conversion should be applied selectively with appropriate pedestrian safety and right-of-way measures.

ABSTRACT
1. 서론
2. 선행연구 고찰
    2.1. 교차로 신호운영 효과분석 선행연구
    2.2. 선행연구와 차별성
3. 연구 방법론
4. 효과분석
    4.1. 가상 네트워크 구축 및 시나리오 설정
    4.2. 가상 네트워크 기대효과 분석
    4.3. 혼합신호 운영체계 개선효과 사례분석
5. 결론
REFERENCES

• 이지원(수원시정연구원 도시데이터분석실 위촉연구원) | Lee Jiwon
• 김도훈(수원시정연구원 도시데이터분석실 연구위원) | Kim Dohoon Corresponding author