A time-resolved detection of the multiphoton ionization induced photocurrents was developed and applied to map a near-field contamination profile of a year-around-active traffic road. Main advantages of the proposed method are in its simplicity and rapidity. No chemical sample preparation is required: analysis is carried out in ambient conditions and the technique can be easily automated. A fast screening of contaminated soils is feasible. The soil samples collected at various radial distances, R, have produced, as method's readout, the photoionization charges, Q. These originate from combustion by-products and were found to decrease according to 1/Q ∼ R. This finding is supported by a straightforward contamination model that largely avoids an obvious complexity associated with the precise mathematical treatment of such a pollution source. We estimate that at R=50 m the concentration of organic contamination is as high as 0.1μg/g.