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DataDan
Advanced Member
585 Posts
[Mentor]
Central Coast, CA
USA
Yamaha
FJR1300
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Posted - 08/06/2018 : 3:10 PM
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Merging into freeway traffic, motorcyclist hits curb on raised divider between onramp and mainline and goes down
I have three of these in my archive, and another happened this weekend--all fatalities. It might seem like a mistake you're unlikely to make, but a little impatience combined with poor conditions could lure in even a more cautious rider. The relevant conditions are lighting and roadway markings. All of these occurred after dark without direct lighting, and in some the painted markings delineating the divider were heavily worn.
Three of these examples, including the most recent, were on I-10 between downtown Los Angeles and Santa Monica, two at La Brea Ave, though one was on the eastbound ramp, the other westbound. Alcohol was a factor in the 2017 crash, but not in 2013 or 2015 (no info on the 2018). Here are Google street view links as the rider would have seen the roadway:
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onthebeach
Standard Member
118 Posts
Arch Cape, Oregon
USA
BMW
R 1200 RT
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Posted - 08/09/2018 : 11:18 AM
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I took a look at each of the photos available in the links posted. While I have certainly ridden freeways and used onramps most of my riding is rural. This is a good reminder of the hazard a low curb presents - especially at speed with other traffic around when a spill could more serious consequences than would an unnoticed curb in a parking lot.
The dividers are interesting as something presenting a minor hazard or perhaps just an annoyance for an automobile but potentially fatal for a motorcycle.
This left me wondering if there is an improvement possible to make onramps safer for motorcyclists. Good reflective marking immediately comes to mind but as mentioned in the post this is degraded over time. The last photo looked to me as if tires had deposited quite a bit of rubber on the divider which would obscure paint.
Is there an alternate design that would make the road safer for motorcyclists?
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scottrnelson
Advanced Member
6949 Posts
[Mentor]
Meridian, ID
USA
Honda
XR650L, 790 Adv R
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Posted - 08/09/2018 : 2:00 PM
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It is not a safety hazard for any motorcyclist that obeys the rules and doesn't merge over until the two lines converge. I'm tempted to cross early sometimes, but never do it. I've seen cars doing it on a few specific merges in California, specifically near Sacramento and Stockton. You're not supposed to cross double thick white lines. |
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dhalen32
Moderator
846 Posts
[Mentor]
Omaha, NE
USA
BMW
R1200RT
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Posted - 08/12/2018 : 5:01 PM
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Dan: I checked the photos out. Thanks. These all appear to be what I would call an edge trap where the motorcyclist no longer has steering control. Is that what caused each crash? Dave |
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DataDan
Advanced Member
585 Posts
[Mentor]
Central Coast, CA
USA
Yamaha
FJR1300
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Posted - 08/13/2018 : 10:44 AM
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quote: Originally posted by dhalen32
Dan: I checked the photos out. Thanks. These all appear to be what I would call an edge trap where the motorcyclist no longer has steering control. Is that what caused each crash? Dave
Basically, yes. Not an edge trap in the sense of an unintentional longitudinal obstacle like a newly re-paved section. But the same effect on the motorcycle.
Because these were all fatalities, they appear, or will appear, in NHTSA's FARS database (Fatality Analysis Reporting System). Here are details from the 2013 and 2015 crashes (the 2017 database is a few months away). In both cases, the first harmful event was striking the curb. In the first, the motorcycle was a cruiser, a Honda VT700C, in the second a sportbike, a Suzuki GSX-R750. The lower ride height of the cruiser may explain why its undercarriage was noted as the impact point, while Gixxer hit at 12 o'clock--presumably the front wheel.
2013 California FARS case 1346, 9/2/2013, I-10 westbound onramp from La Brea Blvd:
manner of collision ........... not collision with motor vehicle first harmful event ........... curb most harmful event ............ fell/jumped from vehicle pre-event movement ............ going straight critical pre-crash event ...... other critical precrash event crash avoidance maneuver ...... unknown pre-crash stability ........... precrash stability unknown pre-impact location ........... departed roadway crash type .................... departed road left side--drove off road initial contact point ......... undercarriage speed limit ................... 65 travel speed .................. unknown speed related ................. unknown driver related factors ........ none driver distracted by .......... not distracted driver impaired by ............ unknown if impaired violations charged ............ none vision obscured by ............ no obstruction noted vehicle factors ............... none
event sequence ................ striking vehicle: impact point ran off road--left ............ 1:non-harmful event curb .......................... 1:undercarriage fell/jumped from vehicle ...... 1:non-collision
2015 California FARS case 1771, 5/9/2015, I-10 westbound onramp from Central Ave:
manner of collision ........... not collision with motor vehicle first harmful event ........... curb most harmful event ............ curb pre-event movement ............ merging critical pre-crash event ...... off the edge of the road on the left side crash avoidance maneuver ...... unknown pre-crash stability ........... tracking pre-impact location ........... departed roadway crash type .................... departed road left side--drove off road initial contact point ......... 12 o'clock speed limit ................... 55 travel speed .................. unknown speed related ................. no driver related factors ........ making other improper turn driver distracted by .......... not distracted driver impaired by ............ unknown if impaired violations charged ............ none vision obscured by ............ no obstruction noted vehicle factors ............... none event sequence ................ striking vehicle: impact point ran off road--left ............ 1:non-harmful event curb .......................... 1:12 o'clock
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rkfire
Advanced Member
1716 Posts
Stratford, CT
USA
Suzuki
Bandit
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Posted - 08/31/2018 : 12:58 PM
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I just cannot recall a merge like that in my area. A curb like that ought to have Armco barrier, a sting of rubber tube makers or something, to ensure this obvious as not a place to cheat the merge. Or just make a mistake. |
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