1.1.3　道路线形

道路用地线　right-of-way line

规划中线　planning center line

道路中线　center line of road

道路线形　road alignment

平面线形　horizontal alignment

平曲线　horizontal curve

圆曲线　circular curve

复曲线　compound curve

纵面线形　vertical alignment

纵坡　longitudinal gradient

竖曲线　vertical curve

横断面　cross section

断面渐变段　transition zone of cross section

加宽缓和段　transition zone of curve widening

路拱曲线　crown curve，camber curve

视距　sight distance

停车视距　stopping sight distance

超车视距　overtaking sight distance

超高　superelevation