Passing spaces and pedestrian access routes are permitted to overlap. The grade of pedestrian access routes shall comply with R302.4, except the grade of curb ramps and blended transitions shall comply with R304 and the grade of ramps shall comply with R407.

These guidelines contain scoping and technical requirements to ensure that pedestrian facilities located in the public right-of-way (including a public right-of-way that forms the boundary of a site or that lies within a site bounded by a property line), are readily accessible to and usable by pedestrians with disabilities.

The Architectural and Transportation Barriers Compliance Board is proposing accessibility guidelines for the design, construction, and alteration of pedestrian facilities in the public right-of-way.

2024年3月14日 · 德生R304收音机我觉得不错，它的声音好听，不闷不尖锐，比4寸喇叭的R308耐听。另外它的频率指针最左边预留有个位置可以安装3mm LED，只是厂家可能考虑成本问题没装。

2022年9月6日 · 传统天线拉出来可调节的位置有限，R304这种180°铁片天线稍微好点可以左右调节，R308那种只能直上直下的更加尴尬。 这里推荐用一截软电线试试，可上、可下、可盘旋、可折叠，总能找到一个底噪更低、失真更小的位置。 再说一句，R304外壳的灰绿颜色太难看！ 要是有色彩明快的外壳就更好了。 三洋有一款收音机和R304外观类似，面板用了两种颜色，提手可放下。 大喇叭是好听的基本要求。 关注一下，谢谢分享！ 看Radiomuseum介绍，三洋这台机 …

The R-304 silencer was developed as a full race two-stroke silencer. The compact design of the short aluminum canister offers optimum performance gains and is recommended for closed-course racing.

2009年7月25日 · 个人感觉调谐的快慢旋钮很实用，因为该收音机短波段只有两个波段，但范围却是从2.2MHz到22.0MHz这么宽，靠普通机械调谐结构很难调准电台位置，而使用这种内部带行星减速齿轮的快慢旋钮就能很轻易调准位置。 音质不错，噪声不是很大。 度盘标尺是透明的有机玻璃，在一端设有安装LED的位置，但却没有安装LED，在黑夜里使用不太方便，就自己加上了一黄色的LED。 波段开关指示也不太明显，在晚上也看不清指示，但不是很影响使用，故未加照明 …

Advisory R304.2.1 Perpendicular Curb Ramps. Detectable warnings are intended to provide a tactile equivalent underfoot of the visible curbline; those placed too far from the street edge because of a large curb radius may compromise effective crossing analysis.

2023年8月8日 · Clear width requirements are contained in R304.5.1 for curb ramps and blended transitions, and in R407.4 for ramps. Where sidewalks are wider than 1.2 m (4.0 ft), only a portion of the sidewalk is required to comply with the requirements in R302.3 through R302.7.

德生最便宜的dsp机之一，只比305p贵了一点点，但304p可以插市电。 我有404p 感觉304应该也就那回事，中波调频信号挺好 底噪小 调谐也准 就是声音还是德生的特色般辣鸡 音量很大 音 …