[Retracted] Application Method of Environmental Protection Building Elements Based on Artificial Intelligence Technology in the Field of Urban Planning and Design

Table 1

Classification standards of urban roads recommended by the International Association of Traffic Engineers.

Classification	Highways and expressways	Trunk road	Secondary trunk road	Collecting and distributing road	Community road
Function	Motor vehicle traffic flow	High volume traffic flow, long-distance traffic flow between clusters and inbound and outbound traffic flow in the urban area	Urban traffic flow, medium distance traffic flow between clusters and inbound and outbound traffic	Trunk road system and community road distribution, access traffic and inter community traffic	Traffic flow in and out of the community and within the plot
Road mileage rate (%)		5~10	10~20	5 ~ 10	60~80
Continuity	Continuity	Continuity	Continuity	It does not need to be continuous and should not cross the trunk line	Continuous between neighbors only
General length (m)	Great changes	8047~40233	4828~16093	3219~8047	≤3219
General spacing (m)	6437	1069~3219	805~1069	≤805	No regulation
Vehicle kilometers (%)		40~65	25~40	5~10	10~30
Road front opening	Do not speak	Limit	Limit	Security or specialized restrictions	Security restrictions
Minimum intersection spacing (m)	1609~3219	402	201	91	91
Speed limit	45~65	35~45	30~35	25~35	20~30
Remarks	Increase traffic capacity and provide expressway	Urban road skeleton		Restricted transit traffic fees