Research Article
An Experimental Study on Lateral Acceleration of Cars in Different Environments in Sichuan, Southwest China
Table 1
Key technical parameters of surveyed roadways.
| Number | Technical grade | Design speed (km/h) | Pavement width (m) | Shoulder width (m) | Median separator | Terrain | Roadway length (m) | Min. curve radii (m) | Max/Min grade (%) | Number of drivers | Pavement condition | |
| 1 | Expressway | 120 | 16 | 3.5 | Yes | Chengdu Plain | 28258 | 650 | −3%~3% | 4 | Dry/regularity | Six lanes | 2 | Expressway | 100 | 15 | 3 | Yes | Chengdu Plain | 26317 | 400 | −4%~4% | 3 | Dry/regularity | 3 | First-class road | 80 | 14 | 2 | Yes | Chengdu Plain | 32758 | 250 | −4%~4% | 3 | Dry/regularity |
| 4 | Expressway | 100 | 11 | 2.5 | Yes | Chengdu Plain | 18141 | 400 | −4%~4% | 3 | Dry/regularity | Four lanes | 5 | Expressway | 100 | 11 | 2.5 | Yes | Hill | 91942 | 400 | −4%~4% | 5 | Wet/regularity | 6 | Expressway | 80 | 10 | 2 | Yes | Hill/mountain | 41081 | 250 | −5%~5% | 5 | Dry/regularity |
| 7 | Second-class road | 60 | 10 | 1.5 | No | Chengdu Plain | 30828 | 200 | −5%~5% | 2 | Dry/regularity | Two lanes | 8 | Second-class road | 60 | 10 | 1.5 | No | Hill | 21873 | 125 | −6%~6% | 3 | Dry/regularity | 9 | Second-class road | 40 | 8 | 0.5 | No | Mountain ridge | 39638 | 60 | −7%~7% | 3 | Dry/regularity | 10 | Tertiary highway | 30 | 7 | 0.25 | No | Mountain ridge | 38845 | 30 | −8%~8% | 3 | Wet/regularity | 11 | Tertiary highway | 30 | 8 | 0.8 | No | Mountain ridge | 32383 | 30 | −8%~8% | 3 | Dry/regularity | 12 | Fourth-class road | 20 | 6 | 0 | No | Mountain ridge | 17838 | 15 | −9%~9% | 3 | Dry/regularity |
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