According to the "Specifications for Setting On-Street Parking Spaces on Urban Roads," the standard dimensions of general parking spaces are determined based on vehicle size. Small parking spaces typically measure 2.5~2.7 meters in width and 5~6 meters in length. A single-lane turning lane should be no less than 3.5 meters wide, while a double-lane turning lane should be no less than 5 meters wide. The turning area should accommodate a vehicle's ability to complete a full turn in one go. For safety or to accommodate medium and large vehicles, the turning area is often set to 6 meters or more. Details are as follows: (Length ≤ 6m, width ≤ 1.8m) vehicles: The standard spacing between vehicles should be no less than 0.5 meters, and the spacing between a vehicle and a wall or the end of the parking space should also be no less than 0.5 meters. (6m < length ≤ 8m, 1.8m < width ≤ 2.2m) vehicles: The spacing between vehicles should be no less than 0.7 meters. Small vehicle parking space: Length should be ≥ 5 meters, width 2.2-2.5 meters. Large vehicle parking space: Length 7-10 meters, width 4 meters, depending on the specific vehicle model. According to the "Architectural Design Specifications for Garages," the dimensions for small car indoor parking spaces are as follows: The external design dimensions for small cars are 4.8m (length) x 1.8m (width) x 2.0m (height). For perpendicular parking, the minimum parking space size should be 5.3m (length) x 2.4m (width), with a minimum driveway width of 5.5m at the front of the parking space. The minimum distance between a small car and the side walls should be 0.6m, and the minimum distance to the front and rear walls should be 0.5m. Modern underground garages have large floor areas and numerous parking spaces. To ensure smooth vehicle movement, driveways are planned to be relatively spacious. Driveways, as horizontal passages dedicated to parking spaces, account for the primary floor area allocated to parking spaces, often occupying 50% or more of the total parking space floor area. Parking space arrangements can be categorized into three types: parallel, angled (30°, 45°, 60°), and perpendicular. Large vehicle parking spaces should not use angled or perpendicular arrangements. Details are as follows: Parallel parking space: Standard length is 6 meters, width 2.5 meters. Angled parking space: Diagonal length should be 6 meters, width 2.8 meters, with a vertical distance of 2.5 meters between the two diagonal lines. Perpendicular parking space: Length should be ≥ 5 meters, typically set at 6 meters, width 2.5 meters. The optimal standard parking space size is generally 2.5m x 5.3m. The "Road Traffic Safety Law" stipulates that on-street parking spaces cannot be set on roads with a width of less than 6 meters. Crosswalks, expressways, and main roads are also prohibited from having parking spaces. Within urban road areas, government authorities may designate parking spaces where pedestrian and vehicle traffic is not obstructed. On-street parking spaces should not interfere with non-motorized vehicle traffic or encroach on their space. They should not be set near intersections, building entrances, or bus stops. Parking regulations, including vehicle types and time limits, should be clearly marked. Measures should be taken to avoid obstructing vehicle flow on the roadway. Additionally, on-street parking spaces should not have ground locks to prevent private occupation. Roads prohibiting on-street parking may have barriers, bollards, or curbs installed. After removal or cancellation of parking spaces, all related signs, markings, and facilities should be promptly cleared to prevent illegal parking and ensure road safety. Furthermore, on-street parking spaces should not be set within 200m~300m of off-street public parking lots. Quantitative regulations for on-street parking space setup: The "Specifications for Setting On-Street Parking Spaces on Urban Roads" provide quantitative rules based on road width. For two-way roads: If the actual roadway width exceeds 12 meters, parking spaces may be set on both sides; if between 12 and 8 meters, on one side; if less than 8 meters, no parking spaces. For one-way roads: If the actual roadway width exceeds 9 meters, parking spaces may be set on both sides; if between 9 and 6 meters, on one side; if less than 6 meters, no parking spaces. Regarding accessible parking spaces, the specifications state that on-street parking spaces should include accessible spaces, accounting for no less than 2% of the total. If there are 20 or more parking spaces, at least one accessible space should be provided. Parking space marking colors: White: Paid parking spaces; Blue: Free parking spaces; Yellow: Reserved parking spaces; Time-limited parking spaces: Dashed border, line width 10cm; the permitted parking time should be marked inside the border, with numbers 60cm high. Accessible parking spaces: Special markings; yellow grid lines on both sides indicate no-parking zones for accessibility purposes, and other vehicles must not occupy these spaces. The pavement markings within the space indicate exclusivity. Yellow grid line width: 120cm; outer line width: 20cm; inner fill line width: 0cm; angle with outer line: 45°; outer line length should match the parking space marking length. Requirements for prohibiting on-street parking spaces: Fire lanes, sections with no-parking signs/markings, or construction zones obstructing traffic; Roads designated for disaster relief and emergency evacuation; Sidewalks (if set, must not encroach on tactile paving); Near building entrances; Intersections, railway crossings, sharp curves, narrow roads ( < 4m), bridges, steep slopes, tunnels, and sections within 50m of these locations; Within 30m of bus stops, emergency stations, gas stations, fire hydrants, or fire stations (except for vehicles using these facilities); Within 20m of intersection channelized areas; Near underground utility (water, electricity, gas) access points or within 15m; Within 200m of off-street parking lot entrances; Near roadside
