What is the Standard Width for Underground Garage Driveways?
1 Answers
The net width of two-way entrance and exit ramps in underground garages should not be less than 7m. The one-way extension length should be less than 4m, while the two-way transition lane for small vehicles should be less than 6m. For modified medium-sized vehicles, the middle lane should be less than 7m. The cross-sectional dimension of two-way lanes should be less than 1.5m, and the two-way transition section should not be less than 3.5m. Within the overall garage layout, the one-way longitudinal passage length should be less than 4m, the two-way transition lane for small vehicles less than 6m, and the interchangeable medium-sized vehicle lane above should be less than 7m. The non-lane width for one-way traffic is expected to be less than 1.5m, while the two-way excess width should not be less than 3.5m. The characteristics of underground parking garages include: High construction costs and long project durations. Underground parking garages have large capacities and generally do not occupy urban land, allowing cities to reserve more space for greening and beautification, thereby improving urban environmental quality. The protective advantages enable the integration of large-capacity underground parking facilities with civil defense infrastructure. The selection requirements for underground parking garages are: The planning and design of underground parking garages should be guided by urban construction and civil defense engineering master plans. They should be located in areas with favorable hydrogeological and engineering geological conditions and flat road surfaces. In cold regions, garage doors should avoid facing north or the prevailing winter wind direction. The entrance area should have sufficient open space for parking, shunting, car washing, etc. When garages are built within rock layers, factors such as rock thickness, lithology, dip slope, and flood levels must be considered.
