<p>As of SUMO 0.29.0, acceleration is not one of the <a href="http://www.sumo.dlr.de/wiki/TraCI/Vehicle_Value_Retrieval" rel="nofollow noreferrer">variables exposed by the SUMO TraCI API of a vehicle</a> - primarily because it is not one of the state variables of the most common car following models.</p>

<p>You will need to compute acceleration yourself, by comparing the current speed of a vehicle to its speed before the last update.</p>

<p>Note that there is more than one way of deriving acceleration from speed, depending on what you assume about the underlying process. For more details, there is <a href="http://arxiv.org/abs/1403.4881" rel="nofollow noreferrer">a 2015 paper by Treiber and Kanagaraj</a> that discusses this.</p>
How to get acceleration of a vehicle in veins?
<p>I am using <code>veins-4.5</code> <code>omnet++ 5</code> and <code>sumo 0.29.0</code>.
How can I access the <em>acceleration</em> of a vehicle in veins?</p>

<p>Thanks a lot.</p>