be periodic insertion and removal. In this case, one inserts a particle into the first well (when empty) at intervals of τ /α , and checks for occupancy of the final well at intervals of τ /β , removing the particle if the well is occupied. A preliminary study of the continuous-space model using periodic insertion and removal confirms that the three TASEP phases are again found. The density profiles under periodic and random particle transfer are very similar in the maximum current phase, where the density profile is insensitive to small changes in the insertion and removal rates. Small systematic differences do however appear in the other phases, as shown in Fig. 12. FIG. 12: Comparison of density profiles obtained using periodic (black) and random (red) insertion and removal, L = 100. Although our study strongly suggests the feasibility of a laboratory realization of the TASEP, a number of additional features would have to be included in the model, before a quantitative comparison with experiment could be made. The principal 24 46 48 50 52 54 i 0.57 0.575 0.58  = 1,  = 1.4 maximum current phase 0 20 40 60 80 100 0.5 1  = 2,  = 1 maximum current phase 0 20 40 60 80 100 i 0.04 0.08 0.12 (i)  = 0.1,  = 1.4 low density phase 0 20 40 60 80 100 0.9 0.93 0.96 (i) periodic random  = 2,  = 0.1 high density phase