[sumo-user] Braking distance used for getJunctionFoes - explained

[Hriday Sanghvi <sanghvih@xxxxxx>]

Hello,

From TraCI's vehicle domain, I am trying to make use of:

getJunctionFoes(self, vehID, dist=0.0)

Return list of junction foes [(foeId, egoDist, foeDist, egoExitDist, foeExitDist, egoLane, foeLane, egoResponse, foeResponse), ...] within the given distance to the given vehicle

1. For the dist parameter, I am calculating maximum braking distance for my ego vehicle as:

square(current_speed) / (2 * max_deceleration_ability) so that ego vehicle can decide to stop in time.

(from the v^2 - u^2 = 2aS formula, assuming constant maximum deceleration and final velocity to be 0). Does that make sense?

2. Sample output that I got using this method:

(('flow_btt.0', 38.19626194106837, 31.700000000000003, 41.396261941068374, 34.900000000000006, ':intersection_2_0', ':intersection_1_0', True, False), ...)

From that, 

a. Just to confirm, are all the distances calculated using the Euclidean distance formula?

b. I assume the egoExitDist and foeExitDist are the distance till the "exit" of the junction?

c. What is egoResponse and foeRespone?

Thank you,

Sincerely,

Hriday