I-15 North & Charleston Blvd EB On-Ramp

The eastbound on-ramp from Charleston onto I-15 North handles drivers from western neighborhoods accelerating to merge with northbound freeway traffic. The acceleration lane length and the speed differential between merging vehicles and mainline traffic are the primary crash factors. This ramp sees its worst conditions during heavy event traffic when surge volumes back up from the freeway onto the surface street approach, and drivers make increasingly risky merge decisions to avoid waiting.

118 crashes with zero fatalities and a clear downward trend — 49, 40, 29 per year — a 41% reduction from 2022 to 2024. This improvement parallels the main Charleston interchange, suggesting coordinated changes to the interchange system as a whole. Hit-and-run rate at 25% is consistent with other freeway ramp locations. One pedestrian crash at a freeway ramp is notable — that’s a particularly dangerous mismatch of speed environments.