Dear rmickey42,
The obstacles may be located anywhere, both on a straight line, a curve or beside the lines. The only limitation is that the obstacle will never cross more than one line (since the robot can’t know how the line is turning below the obstacle). An intersection is considered as several lines, and hence the obstacle can’t be placed straight over an intersection.
Points are awarded for each negotiated obstacle. I.e. if two obstacles is located in the same tile the team will earn 20p. But the points is awarded when the robot continue to follow the line in the next tile.
// Fredrik Löfgren, TC and OC member 2016 / 2017