# AI 告诉英国司机在环岛'右转'时打右转向灯并保持在右车道，忽略英国环岛车道规则

- **ID:** `safety/uk-driving-roundabout-rules`
- **领域:** safety
- **类别:** traffic_law
- **错误码:** `UK-ROUNDABOUT-RIGHT-TURN-ERR`
- **验证级别:** ai_generated
- **修复率:** 92%

## 根因

在英国，车辆靠左行驶。在环岛：对于'右转'（在环岛经过3/4后驶出，即270度），驾驶员必须从右车道进入，接近时打右转向灯，在环岛上保持在右车道，驶出前打左转向灯。AI可能混淆靠左行驶国家（例如澳大利亚使用类似规则）或靠右行驶国家（美国/欧洲），其中右转使用右车道。错误的信号会导致碰撞：英国《高速公路规则》第186条规定右转时打右灯，驶出时打左灯。AI的建议会导致驾驶员横穿车道或未让行。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| UK Highway Code (2023 Edition, Rule 184-190) | active | — | — |
| DVSA Driving Test Standards 2024 | active | — | — |
| Road Traffic Act 1988 (as amended) | active | — | — |

## 解决方案

1. ```
   For a right turn (3rd exit) on a standard 4-exit roundabout: approach in the right lane, signal right on approach, stay in the right lane on the roundabout, check mirrors, signal left just before your exit, and exit safely. Practice on mini-roundabouts first. Example: at a roundabout with exits at 12, 3, 6, and 9 o'clock, right turn is the exit at 6 o'clock (going back the way you came).
   ```
2. ```
   If the roundabout has multiple lanes (e.g., spiral markings), follow road markings: for right turn, use the rightmost lane on approach and follow the spiral to the right lane exiting. Do not change lanes on the roundabout. Use the 'lane discipline' diagram from Highway Code Rule 186: 'When taking any intermediate exit, unless signs or markings indicate otherwise... select the appropriate lane on approach and stay in that lane until you need to exit.'
   ```

## 无效尝试

- **** — On a roundabout, turning right requires entering from the right lane (if two lanes). Left lane is for going straight or left (first exit). Using left lane for right turn forces crossing the path of vehicles exiting from inner lane. (80% 失败率)
- **** — Hazard lights are for emergencies only; using them on a roundabout confuses other drivers and is illegal (Road Traffic Act 1988, Section 36). (95% 失败率)
- **** — UK law requires signaling (Highway Code Rule 186). Failure to signal is a traffic offense (3 points fine). Other drivers cannot anticipate un-signaled turns, causing rear-end or side collisions. (70% 失败率)