Why are left turns more dangerous than right turns for pedestrians?

Left turns require drivers to cross oncoming traffic lanes and multiple pedestrian crosswalks simultaneously. The turn arc is wider and faster than a right turn, giving drivers less reaction time when a pedestrian enters the crosswalk. Drivers making left turns must track oncoming vehicles, turning geometry, and pedestrian crossings all at once. NYC DOT data shows that left-turning vehicles produce significantly more pedestrian fatalities and serious injuries than right-turning vehicles at comparable intersections.

What is a Leading Pedestrian Interval?

A Leading Pedestrian Interval, or LPI, gives pedestrians a head start of several seconds to enter the crosswalk before turning vehicles receive a green light. NYC installed 417 LPIs in 2015 alone and continues to expand the program. An analysis of 104 intersections that received LPIs between 2003 and 2011 found a 56% decline in pedestrian and cyclist fatalities and severe injuries caused by left turns.

Who is liable when a left-turning driver hits a pedestrian in NYC?

Under New York Vehicle and Traffic Law Section 1141, a driver making a left turn must yield the right of way to pedestrians lawfully within the crosswalk. Failure to yield is a traffic infraction and establishes negligence in a personal injury case. If the pedestrian had a walk signal and was in the crosswalk, the turning driver bears presumptive fault. Additional claims may be available against the city if the intersection lacked adequate safety infrastructure despite a known crash history.

What has NYC done to make left turns safer?

Since 2016, NYC DOT has treated 1,236 intersections with turn calming measures including hardened centerlines, rubber curbs, bollards, and slow-turn markings. These treatments reduced average left-turn speeds by 20% and severe pedestrian injuries by 33%. The city has also installed hundreds of Leading Pedestrian Intervals and converted permissive left-turn signals to protected-only phasing at high-crash intersections, which reduced left-turn crashes 99% at treated locations.

What is the left-turn law in NY?

New York doesn't have one statute labeled the left-turn law. Several overlap. Vehicle and Traffic Law § 1141 requires a driver intending to turn left to yield the right of way to any oncoming vehicle close enough to pose a hazard and to any pedestrian lawfully in the crosswalk. VTL § 1112 requires drivers to obey traffic signals, including the Leading Pedestrian Intervals NYC has installed at hundreds of intersections to give pedestrians a head start. A failure-to-yield violation supports a negligence claim. When a pedestrian with a walk signal is struck in the crosswalk by a left-turning driver, the driver bears presumptive fault.

How common are left-turn accidents in NYC?

Left turns are among the most dangerous movements at NYC intersections. NYC DOT's Left Turn Pedestrian and Bicyclist Crash Study linked left-turning vehicles to 108 pedestrian and cyclist fatalities between 2010 and 2014, roughly 13% of all pedestrian and cyclist deaths in that period. The city's turn-calming program has since treated 1,236 intersections with hardened centerlines and bollards, cutting severe pedestrian injuries 33%. Leading Pedestrian Intervals cut left-turn fatalities and severe injuries 56% at the 104 intersections studied. Protected left-turn signals reduced left-turn crashes 99% at the 478 intersections analyzed. The geometry of the left turn is the problem, and the fixes work.

Left Turns Killed 108 NYC Pedestrians in 5 Years

Between 2010 and 2014, left-turning vehicles killed 108 pedestrians and cyclists in New York City. That is roughly 13% of the 859 total pedestrian and cyclist fatalities during that period, from a single turning movement at intersections.

The problem is geometry. A left turn crosses oncoming traffic and sweeps through the crosswalk at a wider, faster arc than a right turn. The driver’s attention is split between oncoming vehicles, the turn itself, and pedestrians who may be halfway across the street. Pedestrians enter the crosswalk expecting to be seen. Many are not.

NYC DOT published a dedicated Left Turn Pedestrian and Bicyclist Crash Study documenting this pattern. The findings triggered one of the largest intersection safety programs in any American city. Here is what the data shows and whether it is working.

77% of Pedestrian Injuries Happen at Intersections

The broader context matters. Approximately 77% of pedestrian injuries and 59% of pedestrian fatalities in NYC occur at intersections. In the first nine months of 2024, 88% of the 88 pedestrians killed were at intersections with no daylighting protection. Daylighting means removing parking near crosswalks so drivers can see pedestrians.

Transportation Alternatives documented in late 2024 that NYC recorded 119 pedestrian deaths through December 30, 2024, an 18% increase from 101 in 2023. Twenty-three pedestrians were injured every day on average. Serious pedestrian injuries rose 13% year-over-year.

Left turns are not the only intersection killer, but they are the most mechanically fixable. The geometry of the turn itself can be changed with physical infrastructure. NYC DOT has been doing exactly that since 2016.

The Turn Calming Program: 1,236 Intersections

NYC DOT launched the turn calming program in 2016. The concept: use physical barriers to force turning vehicles into slower, tighter arcs that give drivers more time to see pedestrians and give pedestrians more time to get out of the way.

Two primary treatments exist.

Basic hardened centerlines (802 locations since 2016): Five pieces of rubber curb and bollards or rubber speed bumps installed on the centerline, extending up to six feet into the intersection. These prevent drivers from cutting the corner on a left turn.

Complete hardened centerlines (147 installations since 2016): Rubber curbs, bollards, “No Parking” markings, slow-turn wedge markings, and flexible plastic posts for one-way to two-way configurations. These cover more of the intersection geometry.

By December 31, 2025, the turn calming program had treated 1,236 intersections citywide.

What the Data Shows

The measured results at treated intersections:

Metric	Change
Average left-turn speed	Down 20%
Crossing the double yellow line on left turns	Down 78.9%
Average right-turn speed	Down 34.1%
Pedestrian severe injuries from vehicle crashes	Down 33%

At intersections where the treatment extends to the crosswalk, drivers crossing the double yellow line during left turns dropped to zero: a 100% reduction.

These are not modeled projections. This is before-and-after crash data from 1,101 treated intersections compared to their pre-treatment baselines.

Leading Pedestrian Intervals: 56% Fewer Left-Turn Deaths

A Leading Pedestrian Interval gives pedestrians a head start, typically 7 to 12 seconds, to enter the crosswalk before turning vehicles get a green light. The pedestrian is already visible in the crosswalk when the driver begins the turn.

NYC installed 13 LPIs in 2013, 55 in 2014, and 417 in 2015. The program has continued expanding since.

The strongest effectiveness data comes from an analysis of 104 intersections that received LPIs between 2003 and 2011. The result: a 56% decline in pedestrian and cyclist fatalities and severe injuries caused by left turns.

Split LPIs, which provide a longer 12-second head start, have been piloted at 28 intersections. At Lafayette Street and Kenmare Street in SoHo, the split LPI gives pedestrians the full 12-second head start before any vehicle movement begins.

Protected Left-Turn Signals: 99% Crash Reduction

The most effective intervention is also the most restrictive. Protected left-turn phasing eliminates the permissive left turn entirely: drivers can only turn left when they have a dedicated green arrow, and pedestrians have a red signal during that phase.

NYC DOT’s before-and-after crash analysis at 478 intersections, using three years of pre- and post-data:

Intervention	Left-Turn Crash Reduction
Protected left-turn phasing (permissive to protected only)	99%
Left-turn restrictions	41% drop in left-turn pedestrian/cyclist injuries
Left-turn bays with protected signals	Significant reductions (combined analysis)

A 99% reduction is not a rounding artifact. When you physically prevent cars from turning left during the pedestrian phase, the crashes disappear.

Where the Gaps Remain

As of 2024, 92% of pedestrians killed at intersections were at locations with no physical daylighting features. The turn calming program has treated 1,236 intersections, but NYC has over 10,000 signalized intersections. Serious injury data from Transportation Alternatives shows 116 intersections with 5 or more killed-or-seriously-injured incidents since 2022. Nearly 3 million NYC residents live within walking distance of these high-KSI intersections.

Borough-level injury trends from 2024 show the problem is not evenly distributed:

Borough	Serious Injury Increase (2023 to 2024)
Queens	21%
Brooklyn	20%
Manhattan	16%
Bronx	10%

Queens and Brooklyn, which have the widest arterial roads and the most complex multi-lane intersections, are seeing the largest surges in serious pedestrian injuries.

The Legal Framework

Under , a driver making a left turn must yield the right of way to any vehicle or pedestrian lawfully within the intersection. Failure to yield is a traffic violation and constitutes negligence per se in a personal injury action.

When a pedestrian is struck by a left-turning vehicle in a crosswalk with a walk signal, the driver bears presumptive fault. The pedestrian does not need to prove the driver was distracted or speeding. The failure to yield is the negligence.

In cases where the intersection had a documented crash history and the city had not implemented turn calming or signal changes, additional claims against the City of New York may be viable. Prior notice is a required element: the city must have known about the dangerous condition. NYC DOT’s own crash data, which identifies high-KSI intersections, can serve as evidence of that knowledge.

2025: Progress, but Not Enough

NYC DOT’s January 2026 year-end report documented NYC’s lowest overall traffic death count on record in 2025: 205 total fatalities, a 19% decline from 253 in 2024. Pedestrian fatalities fell from 122 to 111, a 9% drop. These numbers reflect the cumulative impact of turn calming, LPIs, protected bike lanes, and speed camera expansion.

But 111 pedestrians still died. Twenty-three people a day were still injured. The interventions that work are proven. The question is speed of deployment. At the current rate, it will take years to treat the remaining high-KSI intersections. Every untreated intersection is a known risk with a documented fix.