The invention relates to a system for managing a lighting installation (2) arranged to illuminate a traffic lane (1). An image acquisition device (3) makes it possible to generate a luminance image (Lmes) of a zone (11) of the traffic lane. A processing unit (100) comprises several photometrics (201, 202) of the lighting installation (2). The processing unit comprises a module (4) for determining a set of optical reflection characteristics of the traffic lane, and a control module (6) configured to control at least part of the lighting sources of the installation lighting (2), as a function of determined optical reflection characteristics, of at least part of the photometries of the lighting installation (2); and reference luminance characteristics. The invention also relates to a corresponding method.