Table 4. Street tree material conditions by city

Item	Seoul	Lebanon OR	Yokohama	Paris
Law, standards & manual	「Creation and Management of urban forest act」Seoul metropolitan government construction specification	「Code of Ordinance」Lebanon Ordinance No. 2913: 1Street tree policy and Potential street tree guide	- Quality dimensional standards for public trees - Civil engineering work common specifications - Road greening technical standards - Park Green Space Facility Standard design collection	- Travaux de plantation des arbres et arbustes - Produits de pépinières. NF V : 12. - Paris land use plan
Conditions factors	Suitable for climate and soilHarmony with the landscapeHistory and cultureLocalityPublic healthEnvironmental, climate control	- well-developed branches and root systems - Healthy, vigorous, free from decay, defects, sunscald injuries, etc	- Beautiful scenery - Comfort - Enhance road and local value - Safety, proper maintenance and harmony	- Harmony with the landscape - Climate control - Biodiversity - Local species
Quality of size and standard	Root ball size ≧ 4RDBM or R - DBM : 10cm ≦ N (in big tree trail : 12cm≦N) - R : 12cm ≦ N / H : 3.5m ≦ N	Root balls size (Americanhorts, 2014) 1½~2 caliper tree diameter	- Height, spread, diameter - Root ball size by Height(Yokohama, 2022)	- Root ball size must not be less than 3 times trunk diameter at 1m from the ground - Age, number of branch, Size, etc(by Type of plants)
Acceptable street tree list	KFS(2020c)(No legal status)	Lebanon OR(2002)-75 species(Only trees)-Max Height & Spread-Under overhead utility(Y/N)	- MLIT(2004) - 156 Species(include shrubs) - Height, spread, diameter	- ANFOR(1990) - CEREMA(2019) (No legal status)

Source : KFS(2020a), Seoul(2018), Lebanon OR(2002; 2022), MLIT(2004; 2016), Yokohama(2021; 2022), UNEP et al.,(2012), ANFOR(1990), Paris(2016)