"A"and"B" Streets
A類型和B類型街道
The classification of A and B streets was invented by new urbanists to prioritize thoroughfares that were，or could be transformed into，commendable predestrian experience.The classification is rudimentary but helps identify pedestrian-friendly and auto-oriented thoroughfares
A和B類型街道的分類是由新都市主義者發(fā)明，給那些已經(jīng)是或可能可以轉(zhuǎn)化為行人友好的道路以優(yōu)先權(quán)。這種分類很簡單，但有助于識別行人友好和自動導(dǎo)向的道路。
A streets are thoroughfares that provide an excellent pedestrian experience and promote safety，comfort，and convenience for pedestrians.These streets have the characteristics that are good for walking such as buildings and entrances fronting the street，wide sidewalks，crosswalks，street trees，well-designed street lighting，narrow curb-to-curb dimensions，small curb radii，parallel parking on-street，and lower traffic speeds.
A類型街道提供了良好的行人體驗(yàn)，是安全，舒適和便利的通道。這些街道具有適合步行的特點(diǎn)，如街道前面的建筑物和入口，寬闊的人行道，人行橫道，街道樹木，精心設(shè)計(jì)的街道照明，狹窄的路緣到路邊尺寸，小道路轉(zhuǎn)彎半徑，與街道平行的停車位和較低的通車速度。
B streets are thoroughfares that are intended for automobile-related functions such as access to parking lots or garages，loading docks，drive-through businesses，and gas stations.They are less accommodating of pedestrians.Frontage and build-to-line requirements may be less stringent on B streets.
B類型街道是用于與汽車相關(guān)功能的通道，例如進(jìn)入停車場或車庫，裝卸碼頭，免下車商業(yè)和加油站的通道。他們對行人的接納度較低。建筑外立面和臨街界面的進(jìn)退要求對B類型街道不太嚴(yán)格。
The diagram on the left illustrates a tartan grid of alternating A and B streets。The A streets have a narrow curb-to-curb dimension，on-street parking，and street trees，whereas the B streets have a wider curb-to-curb dimension，dedicated left turn lanes，and access to alleys。
左邊的圖表顯示了交織的A類和B類街道的網(wǎng)格。A類街道狹窄，路緣到路邊的尺寸很小，有路邊停車場和街道樹；而B類街道路緣到路邊的尺寸更寬，有專用的左轉(zhuǎn)車道，以及通往小巷的通道。
The block platting achieves a bias toward A streets by having two-thirds of the lots front the A streets and one-third face the B streets。All lots are accessible from the Alley network.
街區(qū)用地三分之二面向A類街道，三分之一面向B類街道實(shí)現(xiàn)向A街道傾斜。所有地塊都可以從小路網(wǎng)絡(luò)進(jìn)入。
Corner lots are usually desirable for retail businesses as they are visible from four directions。Lots at the intersection of A and B streets are optimum for retail businesses that rely on both pedestrian and vehiclar traffic。
對于零售商業(yè)來說，街角地塊通常是理想的，因?yàn)樗鼈兛梢詮乃膫€方向被看到。在A類型和B類型街道交叉口處的地段對于依賴行人和車輛交通的零售商業(yè)來說就最好了。
In retrofit situations，A streets may be designated to receive prioritized spending for pedestrian and bicyclist safety，street-tree plantings，and other elements that are desirable on pedestrian-friendly thoroughfares。
在改造情況下，可以設(shè)計(jì)A類型街道來為行人和騎自行車者的安全，行道樹的種植，以及行人友好通道所需的其他元素的獲得優(yōu)先費(fèi)用。
